Question

A survey reveals that one airline’s flights have a 92% probability of being on time. Based on this, out of 4000 flights in a year, how many flights would you predict will arrive on time?

A 368 C 3,680
B 386 D 3,860

Answer 1

The expected value =Probability x 4,000 ==> 0.92 x 4,000 =3,680 (D)

Answer 2

To find 92% of 4000, convert the percent into a decimal (0.92) and then multiply it by 4000 to get 3680. The correct answer is d.