# The Number of bums solved correctly : If

Answered

Mohan gets 3 marks for each correct sum and loses 2 marks for each wrong sum. He attempts 30 sums and obtain 40 marks. The number of sums solved correctly is

- 25
- 10
- 15
- 20

Best answer

**Answer: (4) 20
Explanation:-**

Let be the currently question solved by Mohan = P

According to the question,

3 x X – (30 – X) x 2 = 40

3 X – 30 x 2 + X x 2 = 40

3 X – 60 + 2 X = 40

5 X = 40 + 60

5 X = 100

X = 100/5

X = 20

Hence, the currently question solved by Mohan is 20.