Question

In a competition, 2 marks are allotted to every right answer and -1 for every wrong
answer.
Tina scored 15. 10 of her answers were correct. How many answers were incorrect?

Answer 1

Answer:

let the no.of wrong answers be x

10(2)+x(-1)=15

20-x=15

-x=-5

x=5

5 answers were wrong.

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