For aiming a target a person gets one rupee each time when he hits it and loses one rupee when he misses it. If he gets Rs 40 after aiming at the target one hundred times, then how many times did he miss the target?

A30 ✓ Correct

B40

C60

D70

Correct answer: (A) 30

Explanation

He missed the target 30 times.

Let hits = h and misses = m, with h + m = 100.

Each hit gives +1 and each miss gives -1, and the net is Rs. 40.

So h - m = 40.

Adding : 2h = 140, h = 70, hence m = 100 - 70 = 30.

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