At an airport, 77% of recent flights have arrived on time. A sample of 11 flights is studied. Find the probability that no more than 4 of them were on time.
A) 0.0039
B) 0.0046
C) 0.9954
D) 0.9961

Question

Quizplus · Accepted Answer

The problem can be solved using the binomial probability formula. The probability of a flight arriving on time is 0.77, and we want the probability of 4 or fewer flights arriving on time out of 11. Using the binomial distribution, the cumulative probability for 0 to 4 flights arriving on time is approximately 0.0046.

At an Airport, 77% of Recent Flights Have Arrived on Time