Answer:
c and d
Step-by-step explanation:
I believe the answer is D
Answer:
30+18 x
Step-by-step explanation:
Answer:
0.0821
Step-by-step explanation:
If the arrival rate is 50 customers per hour (60 minutes), then the expected number of customers in 3 minutes is:

Assuming a Poisson distribution with 2.5 customers per 3 minutes, the probability that zero customers arrive for 3 minutes is:

The probability that the bank stays empty for three minutes is 0.0821.
Answer:
what's the question i need more info