Question

3 fair coins are tossed. What is the probability that at least one is a tail (enter the probability as a fraction.)

Answer 1

First, you should find:

Probability of NOT getting a tail in 3 coin toss:

`((1)/(2))^3=(1)/(8)`

After that, you should find the probability of getting at least one tail in 3 fair coins tossed

`1-(1)/(8)=(8-1)/(8)=(7)/(8)`

Answer: 7/8