A coin is tossed 4 times. If getting a t...

A coin is tossed 4 times. If getting a tail is a success, then the probability of 3 successes is :

A

`1/2`

B

`3/8`

C

`1/8`

D

`1/4`

Verified by Experts

The correct Answer is:

`1/4`

Applying Bernoulli Trial N(Total Cases) = 4 P(T) = 1/2 , P(H) = 1/2 P(x=3) = 4C3*(1/2)^3*(1/2)^1 P(x=3) = 1/4

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