Question

In a quiz competition +2 marks are given fopr every correct answer and -2 marks for every incorrect answer and no marks for not attemppting ant question. Team A scores 20 marks.If the have 10 correct answers,How many questions did they attempt incorrectly?

Answer 1

Marks awarded for every correct answer=+2
Marks awarded for 10 correct questions=2×10
= 20 marks
So, he attempt 0 questions incorrectly.