Question

If I toss 3 coins, the probability that I will have exactly 2 heads is:

Answer 1

We have the next possible events

`2^3=8`

The events are

HHH

HHT

HTH

HTT

THH

THT

TTH

TTT

The probability that I will have exactly 2 heads is

`P(exactly\text{ 2 heads)=}(3)/(8)`