Question

In a certain examination a candidate answered 25 question

Answer 1

Answer:

And? what's the full question?

Answer 2

Their are total 25 questions to be answered.

Lets true answers be x, then false answers are (25−x).

As per the question, number are 2x or −1(25−x)

So, 2x−(25−x)=2

∴2x+x=2+25

∴3x=27

∴x=9