Question

In a class test (+2) marks are given for every correct answer and (-1) marks are given for every incorrect answers attemped by -
Heena , if she scored 30 marks though she got 35 correct answers .
Please give full explanation ​

Answer 1

Answer:

40 incorrect answers

Step-by-step explanation:

No of correct answers = 35

Marks she got for correct answers = 35 * 2 = 70

No of incorrect answers = x

Marks she got for wrong answers = -1 * x = -x

Total marks = mark for correct answer + mark for incorrect answer = 30

                    = 70 + ( - x) = 30

x = 70 - 30

x = 40.

∴ She got 40 incorrect answers

HOPE IT HELPS!!!