Mark (√) against the correct answer in each of the following:
The probability that a man can hit a target is 
. He tries five times. What is the probability that he will hit the target at least 3 times?
The probability that the man hits the target is 3/4
Using Bernoulli’s Trial we have,
P(Success=x) = nCx.px.q(n-x)
x=0, 1, 2, ………n and q = (1-p), n =5
p = �, q = �
Probability that he will hit at least 3 times is =
P(3)+P(4)+P(5)
⇒ 5C3(
)3(
)2+5C4(
)4(
)1+5C5(
)5(
)0
⇒ 
1