Question

in a competition 3 marks are given for every correct answer and -2 marks are given for every incorrect answer and no marks for not attempting any questions
Mohini scores (-5) marks in this competition though she has got 7 correct answers and attempted all questions how many questions she has attempted incorrectly?
​

Answer 1

Answer:

13

Step-by-step explanation:

Let the no. of questions that she have attempted incorrectly be 'x'

She wrote 7 correct answers.

So, Total marks for correct answer is 21 (7 × 3)

And total marks for incorrect answers is -2x

Total marks scored is - 5

So,

21 -2x = - 5

2x = 21 + 5

2x = 26

x = 13

So no. of incorrect answers is 13