Question

4.
In an MCQ question paper, a student gets
4 marks for each right answer and loses 1 mark
for each wrong answer. Now, if a student attempts
10 questions and secures 30 marks, then the
number of wrong answers is
(1) 8
(2) 2
(3) 12
(4) None of these​

Answer 1

Answer:

(4) None of these

Step-by-step explanation:

4X10=40 Means the student loses 10 marks in the MCQ Question paper...

1x10=10...So he attempted 10 wrong answers

Answer 2

Answer:

let right questions =x

let wrong question =y

x+y=10

and second equation is

4x-y=30

from equations 1 and 2

x=8 and y=2

so the wrong questions no. is 2

right option is B