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).

Probability she receives call 4times is 0.8

Step-by-step explanation:

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

Expected outcome is 4

Hence probability= expected outcome ÷ total outcome

Probability = 4/5 = 0.8

the answer is 510

step-by-step explanation:

15 • 13 = 195

15 • 12 = 180

15 • 5 = 75

12 • 5 = 60

195 + 180 = 375

375 + 75 = 450

450 + 60 = 510