Question

In a competitive examination, (+4)

marks are given for every correct

answer, (−2) marks are given for every

incorrect answer and 0 marks for not

attempting the question.

a) Ruchi scored 20 marks. If she

has got 12 correct answers, how

many questions has she attempted

incorrectly?

b) Rohit scored (−6) marks in this

test, though he has got 7 correct

answers. How many questions has

he attempte​

Answer 1

let the no of questions attempted incorrectly be X

12*4+X*(-2)=20

48-2x=20

-2x=20-48

-2x=-28

X=14

Answer 2

AnSwEr

${\tt{\red{\underline{\large{Given}}}}}$

• A word problem
• Correct Answer :- 4+
• Wrong Answer:- -2
• Not attempting the question:-0

${\sf{\green{\underline{\large{To\:find}}}}}$

1. Incorrectly answer for the Question
2. Question attempted

${\sf{\pink{\underline{\Large{Explanation}}}}}$

1.

___________________________

• Ruchi scored :-20 marks
• He got 12 correct answer

Total marks for correct Answer = 12×4=48

• No he got actually = CORRECT MARKS - Deducted marks for wrong answer

• 12 = 48 - x
• X= 36

• Deducted marks for wrong answer is 36
• No of wrong Question = 36/2 =18

_________________________

2

_________________________

• Rohit scored -6 marks in test
• He got 7 correct answer

Total marks for correct Answer = 7×4=28

• No he got actually = CORRECT MARKS - Deducted marks for wrong answer

=>-6 = 28- x

=>X= 34

• Deducted marks for wrong answer is 36
• No of wrong Question = 34/2 =17

• No of Question he answered = (17+7)=24

__________________________