Q. 225.0( 2 Votes )

The probability of a man hitting a target is 0.25. He shoots 7 times. What is the probability of his hitting at least twice?

Answer :

Given that man shoots 7 times, so n=7


And probability of hitting target



Where,


P(X=r≥2) =1-[p(r=0) +P(r=1)]









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