Question

A Department of transportation report about air travel that nationwide, 76% of all flights are on time. In a sample of 12 flights, what is the probability that 3 flights will be late?

Answer 1

The probability of 3 flights are late is 0.25.

Explanation:

Total number of flights = 12

Flights on time = 76 % = 0.76 x 12 = 9.12 = 9

flights which are late = 24 % = 0.24 x 12 = 2.88 = 3

The probability of 3 flights are late is

P = 3/12= 1/4 = 0.25