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A missile is destroyed bfore hitting the target by a probability of 1/3. If the missile is nt destroyed probability of hitting the target is 3/4. Three missiles are fired .The probability of exactly 2 hits the target is..?

Ranjita yadav , 12 Years ago
Grade 11
anser 1 Answers
SAURAV MAJI

Last Activity: 12 Years ago

prob missile not destroyed=2/3

prob hitting target if not dest=3/4

prob hitting target if fired= 2/3*3/4=1/2

Prob not hitting target= 1-1/2=1/2

required prob= (3C2) (1/2)^2 (1/2)^1=3/8

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