Q. 35.0( 1 Vote )

Mark the correct A. 11

B.9

C. 7

D. 5

Answer :

Given:

Chances of hitting a target in a trial=10%=

Chances of not hitting the target = 90%=

Total probability = 50%=5

Let number of trials=n

So number of trials missed=n-1 to hit on nth trial

Total probability

= 5

Take log on both sides

n=6.58

So one must hit it seven times.

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Mark the correct A. 11B.9C. 7D. 5