Question

A fair coin is tossed 3 times. The probability of throwing 3 tails = 0.125, two tails = 0.375 and 1 tails = 0.375. What is the probability of throwing 1 head?

Answer 1

0.375

Explanation:

You could throw

HTT `=1/2 xx 1/2 xx 1/2=1/8`

THT `=1/2 xx 1/2 xx 1/2=1/8`

TTH `=1/2 xx 1/2 xx 1/2=1/8`

`1/8 + 1/8 + 1/8 = 3/8 or 0.375`