Solve this:
142. A man can kill a bird once in four shots. On this assumption he fires four shots. Then the probability that the bird is killed, is
(1) 81 256                           (2) 111 256
(3) 144 256                            (4) 175 256

Dear student
Let A be the event four shots hitThen P(A)=14PA¯=1-P(A)=1-14=34P(bird killed)=1-P(none of 4 shots hit)=1-34×34×34×34=1-81256=256-81256=175256
Regards

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