Question

In a competitive examination, containing 24 questions, 5 marks are awarded for every
correct answer and (-2) marks are awarded for every incorrect answer and 0 marks are
awarded for questions not attempted.
a) David attempts 8 correct and 16 incorrect answers. Find his score. Ans: 8
b) Raveena attempts 16 correct and 8 incorrect answers. Find her score. Ans: 64
c) Hamid attempts 4 correct and 12 incorrect answers. If he attempts 16 questions
out of 24 questions, what is his score? A

Answer 1

Answer:

Hamid's score will be -40

Answer 2

Concept

When objects are collected together, addition, a mathematical operation, explains how many total items there are in the collection. When you want to know how many objects are still in the group after removing a specific number of them, you use subtraction. When two numbers are multiplied, it is equivalent to adding the first number to itself a number of times equal to the value of the second number. Another fundamental math operation is division. Essentially, dividing is the act of dividing something into equal parts or groups.

Given

A competitive exam with 24 questions awards 5 marks for each correct response, -2 marks for each incorrect response, and 0 marks for questions that are not attempted.

David tries 8 right answers and 16 wrong ones.

16 of the answers Raveena tries are correct, while 8 are not.

Hamid gives 4 correct answers and 12 false ones.

Find

We have to find the scores of David, Raveena, and Hamid.

Solution

Since David tries 8 right answers, so the marks he got for correct answer = 8 * 5 = 40.

He tries 16 wrong answers, so the marks he got wrong answer = 16 * (- 2) = - 32

So, the score of David = 40 - 32 = 8.

Since Raveena tries 16 right answers, so the marks he got for correct answer = 16 * 5 = 80.

He tries 8 wrong answers, so the marks he got wrong answer = 8 * (- 2) = - 16.

So, the score of David = 80 - 16 = 64.

Since Hamid tries 4 right answers, so the marks he got for correct answer = 4 * 5 = 20.

He tries 12 wrong answers, so the marks he got wrong answer = 12 * (- 2) = - 24.

So, the score of David = 20 - 24 = - 4.

Hence, the scores of David, Raveena, and Hamid are 8, 64, and - 4 respectively.

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