A small town has three traffic lights in a row down its main street. The chance of any one light being green is 50%. What is the probability that all three traffic lights will be green at the same time?
1/2
1/4
1/8
1/1
One being green: 1/2 (as stated in the question) Two being green simultaneously: 1/2 * 1/2 = 1/4 Three being green simultaneously: 1/2 * 1/2 * 1/2 = 1/8
