Question

In a competitive exam, 4 marks are given for every correct
answer and 1 mark is deducted for every incorrect answer.
Sahira scored 30 marks though she got 10 correct answers.
How many incorrect answers did she attempt?​

Answer 1

Answer:

1. Marks for 1 correct answer = 4

total marks given for 10 correct answer= 10×4=40

2. Marks for incorrect answer= total marks- marks for correct answer

= 30 - 40 = (-10)

3. Marks for 1 incorrect answer is = -1

4. No of incorrect answers= -10/-1 = 10

therefore sahira has attempted 10 incorrect answers