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Q.

The probability that a bomb dropped from a plane strikes the target is 15  . The probability that out of six bombs dropped at least 2 bombs strike the target is

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a

0.345

b

0.246

c

0.543

d

0.426

answer is A.

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Detailed Solution

Given that : p=15,q=45 ,n=6 P(X≥2)=1−[P(X=0)+P(X=1)]                      = 1−[6C0(45)6+6C1(45)(15)4]                     = 0.345
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