Question

In a class test, +5 marks are awarded for every correct answer and -2 marks are awarded for every incorrect answer and no marks for not attempting any question. Rahul answered all the questions and scored 40 marks though he got 16 correct answers. How many incorrect answers had he attempted?

Answer 1

Answer:

+5 on every correct qnswer.

-2 on every incorrect answer.

no marks on non attempt questions.

Rahul answered all questions and get 40 marks.

16 answers were correct.16×5=80

80-40=40 as he had loss 40marks.

if -2 on every incorrect question

then 40/2=20

therefore he had write 20 questions wrong