Question

A student flips a coin three times. What is the probability the coin lands tails up exactly two times? The probability is

Answer 1

Given data:

The numbers of times coin flipped is n=3.

The sample space is,

`S=\mleft\lbrace(\text{HHH}\mright),\text{ (HHT), (HTH), (HTT), (THH), (THT), (TTH), (TTT)}\}`

The expression for the probability of getting exactly 2 times tail is,

`P(2T)=(3)/(8)`

Thus, the probability of getting exactly 2 times tail is 3/8.