Calculating the Total Marks for Correct Answers

Oct 13, 2025 by wbrum.org 60 views

In a mathematics quiz, ${$ (+5) $}$ marks are given for every correct answer and ${$ (-2) $}$ marks are given for every wrong answer. Deepa scored 40 marks. If she has 10 correct answers, how many questions did she attempt wrongly?

In a mathematics quiz, Deepa is awarded ${$ (+5) $}$ marks for every correct answer and ${$ (-2) $}$ marks for every wrong answer. This scoring system is a common method used in various competitive exams to evaluate the performance of students.

Calculating the Total Marks for Correct Answers

Deepa scored 40 marks in total. Since she was awarded ${$ (+5) $}$ marks for every correct answer, we can calculate the total marks she received for her correct answers by multiplying the number of correct answers by the marks awarded for each correct answer.

Let's assume the number of correct answers is denoted by 'c'. We are given that Deepa has 10 correct answers, so c = 10.

The total marks for correct answers can be calculated as follows:

Total marks for correct answers = c * 5 = 10 * 5 = 50

Calculating the Total Marks for Wrong Answers

Since Deepa scored a total of 40 marks, and she received 50 marks for her correct answers, the remaining marks must be for her wrong answers. We can calculate the total marks for her wrong answers by subtracting the total marks for correct answers from the total marks scored.

Total marks for wrong answers = Total marks scored - Total marks for correct answers = 40 - 50 = -10

However, since the marks for wrong answers are ${$ (-2) $}$, we can calculate the number of wrong answers by dividing the total marks for wrong answers by the marks awarded for each wrong answer.

Number of wrong answers = Total marks for wrong answers / -2 = -10 / -2 = 5

Conclusion

In conclusion, Deepa attempted 5 questions wrongly in the mathematics quiz.

Mathematical Representation

Let's represent the situation mathematically. Let 'c' be the number of correct answers and 'w' be the number of wrong answers.

We are given that c = 10 and the total marks scored is 40.

The total marks for correct answers can be represented as 5c, and the total marks for wrong answers can be represented as -2w.

Since the total marks scored is the sum of the marks for correct and wrong answers, we can write the equation as follows:

5c - 2w = 40

Substituting c = 10, we get:

5(10) - 2w = 40 50 - 2w = 40

Solving for w, we get:

-2w = -10 w = 5

Therefore, Deepa attempted 5 questions wrongly.

Frequently Asked Questions

Q: What is the scoring system used in the mathematics quiz?

A: The scoring system used in the mathematics quiz is ${$ (+5) $}$ marks for every correct answer and ${$ (-2) $}$ marks for every wrong answer.

Q: How many correct answers did Deepa score?

A: Deepa scored 10 correct answers.

Q: How many marks did Deepa receive for her correct answers?

A: Deepa received 50 marks for her correct answers.

Q: How many marks did Deepa receive for her wrong answers?

A: Deepa received -10 marks for her wrong answers.

Q: How many questions did Deepa attempt wrongly?

A: Deepa attempted 5 questions wrongly.

Q: What is the equation representing the situation mathematically?

A: The equation representing the situation mathematically is 5c - 2w = 40.

Q: How can we solve for the number of wrong answers?

A: We can solve for the number of wrong answers by substituting the value of c and solving for w.

Q: What is the value of w?

A: The value of w is 5.

Q: What does the value of w represent?

In this section, we will address some of the most common questions related to the mathematics quiz and the scoring system used.

Q: What is the scoring system used in the mathematics quiz?

A: The scoring system used in the mathematics quiz is ${$ (+5) $}$ marks for every correct answer and ${$ (-2) $}$ marks for every wrong answer.

Q: How many correct answers did Deepa score?

A: Deepa scored 10 correct answers.

Q: How many marks did Deepa receive for her correct answers?

A: Deepa received 50 marks for her correct answers.

Q: How many marks did Deepa receive for her wrong answers?

A: Deepa received -10 marks for her wrong answers.

Q: How many questions did Deepa attempt wrongly?

A: Deepa attempted 5 questions wrongly.

Q: What is the equation representing the situation mathematically?

A: The equation representing the situation mathematically is 5c - 2w = 40.

Q: How can we solve for the number of wrong answers?

A: We can solve for the number of wrong answers by substituting the value of c and solving for w.

Q: What is the value of w?

A: The value of w is 5.

Q: What does the value of w represent?

A: The value of w represents the number of questions Deepa attempted wrongly.

Q: Can we use the same equation to find the number of correct answers?

A: Yes, we can use the same equation to find the number of correct answers. If we know the number of wrong answers, we can substitute that value into the equation and solve for c.

Q: How can we find the number of correct answers if we know the number of wrong answers?

A: We can find the number of correct answers by substituting the value of w into the equation 5c - 2w = 40 and solving for c.

Q: What is the relationship between the number of correct answers and the number of wrong answers?

A: The number of correct answers and the number of wrong answers are related through the equation 5c - 2w = 40. If we know the value of one, we can find the value of the other.

Q: Can we use the equation to find the total number of questions attempted?

A: Yes, we can use the equation to find the total number of questions attempted. If we know the number of correct answers and the number of wrong answers, we can add them together to find the total number of questions attempted.

Q: How can we find the total number of questions attempted?

A: We can find the total number of questions attempted by adding the number of correct answers and the number of wrong answers.

Q: What is the total number of questions attempted by Deepa?

A: The total number of questions attempted by Deepa is 10 + 5 = 15.

Q: What does the total number of questions attempted represent?

A: The total number of questions attempted represents the total number of questions Deepa attempted in the mathematics quiz.

Q: Can we use the equation to find the percentage of correct answers?

A: Yes, we can use the equation to find the percentage of correct answers. If we know the number of correct answers and the total number of questions attempted, we can calculate the percentage of correct answers.

Q: How can we find the percentage of correct answers?

A: We can find the percentage of correct answers by dividing the number of correct answers by the total number of questions attempted and multiplying by 100.

Q: What is the percentage of correct answers for Deepa?

A: The percentage of correct answers for Deepa is (10/15) x 100 = 66.67%.

Q: What does the percentage of correct answers represent?

A: The percentage of correct answers represents the percentage of questions that Deepa answered correctly in the mathematics quiz.

Q: Can we use the equation to find the percentage of wrong answers?

A: Yes, we can use the equation to find the percentage of wrong answers. If we know the number of wrong answers and the total number of questions attempted, we can calculate the percentage of wrong answers.

Q: How can we find the percentage of wrong answers?

A: We can find the percentage of wrong answers by dividing the number of wrong answers by the total number of questions attempted and multiplying by 100.

Q: What is the percentage of wrong answers for Deepa?

A: The percentage of wrong answers for Deepa is (5/15) x 100 = 33.33%.

Q: What does the percentage of wrong answers represent?

A: The percentage of wrong answers represents the percentage of questions that Deepa answered incorrectly in the mathematics quiz.

Q: Can we use the equation to find the average score per question?

A: Yes, we can use the equation to find the average score per question. If we know the total marks scored and the total number of questions attempted, we can calculate the average score per question.

Q: How can we find the average score per question?

A: We can find the average score per question by dividing the total marks scored by the total number of questions attempted.

Q: What is the average score per question for Deepa?

A: The average score per question for Deepa is 40/15 = 2.67.

Q: What does the average score per question represent?

A: The average score per question represents the average score that Deepa received per question in the mathematics quiz.

Q: Can we use the equation to find the average score per correct answer?

A: Yes, we can use the equation to find the average score per correct answer. If we know the total marks scored for correct answers and the number of correct answers, we can calculate the average score per correct answer.

Q: How can we find the average score per correct answer?

A: We can find the average score per correct answer by dividing the total marks scored for correct answers by the number of correct answers.

Q: What is the average score per correct answer for Deepa?

A: The average score per correct answer for Deepa is 50/10 = 5.

Q: What does the average score per correct answer represent?

A: The average score per correct answer represents the average score that Deepa received per correct answer in the mathematics quiz.

Q: Can we use the equation to find the average score per wrong answer?

A: Yes, we can use the equation to find the average score per wrong answer. If we know the total marks scored for wrong answers and the number of wrong answers, we can calculate the average score per wrong answer.

Q: How can we find the average score per wrong answer?

A: We can find the average score per wrong answer by dividing the total marks scored for wrong answers by the number of wrong answers.

Q: What is the average score per wrong answer for Deepa?

A: The average score per wrong answer for Deepa is -10/5 = -2.

Q: What does the average score per wrong answer represent?

A: The average score per wrong answer represents the average score that Deepa received per wrong answer in the mathematics quiz.

Q: Can we use the equation to find the percentage of questions answered correctly in the first half of the quiz?

A: Yes, we can use the equation to find the percentage of questions answered correctly in the first half of the quiz. If we know the number of correct answers and the total number of questions attempted, we can calculate the percentage of questions answered correctly in the first half of the quiz.

Q: How can we find the percentage of questions answered correctly in the first half of the quiz?

A: We can find the percentage of questions answered correctly in the first half of the quiz by dividing the number of correct answers by the total number of questions attempted and multiplying by 100.

Q: What is the percentage of questions answered correctly in the first half of the quiz for Deepa?

A: The percentage of questions answered correctly in the first half of the quiz for Deepa is (10/15) x 100 = 66.67%.

Q: What does the percentage of questions answered correctly in the first half of the quiz represent?

A: The percentage of questions answered correctly in the first half of the quiz represents the percentage of questions that Deepa answered correctly in the first half of the mathematics quiz.

Q: Can we use the equation to find the percentage of questions answered correctly in the second half of the quiz?

A: Yes, we can use the equation to find the percentage of questions answered correctly in the second half of the quiz. If we know the number of correct answers and the total number of questions attempted, we can calculate the percentage of questions answered correctly in the second half of the quiz.

Q: How can we find the percentage of questions answered correctly in the second half of the quiz?

A: We can find the percentage of questions answered correctly in the second half of the quiz by dividing the number of correct answers by the total number of questions attempted and multiplying by 100.

Q: What is the percentage of questions answered correctly in the second half of the quiz for Deepa?

A: The percentage of questions answered correctly in the second half of the quiz for Deepa is (10/15) x 100 = 66.67%.

Q: What does the percentage of questions answered correctly in the second half of the quiz represent?

A: The percentage of questions answered correctly in the second half of the quiz represents the percentage of questions that Deepa answered correctly in the second half of the mathematics quiz.