Question

In I.Q test , 4 marks are given for every correct and 2 marks are deducted for every wrong answer. If Crystal answer 30 questions and scored 84 marks, how many of her answers correct?

Answer 1

Answer:

The answer is given below:

No. of correct answers = 25

So, marks secured = 25 x 4 = 100

Let, he did x no. of incorrect answers.

So, marks be cut = x × (-2) = -2x

Thus,

100-2x= 68

=>2x = 100 - 68

=>2x = 32

=>x = 16

So, Rohit did 16 incorrect answers and in

total he attempted (25 +16) = 41

questions.

Thank You for Your question.