Question

Suppose a representative at car care service center receives a phone call every 4 minutes on average. Find the probability that she receives 4 phone calls in 20 minutes (round off to third decimal place).

Answer 1

Probability she receives call 4times is 0.8

Explanation:

Total outcome = 5 since 20min ÷ 4min is 5

Expected outcome is 4

Hence probability= expected outcome ÷ total outcome

Probability = 4/5 = 0.8