A. what is the probability that a service time is less than or equal to one minute (to 4 decimals)?

a. What is the probability that a service time is less than or equal to one minute (to 4 decimals)?"

The exponential distribution probability is given by the formula:

where: 

λ = average in unit time = 1/2.2 = 0.45 services per minute       

t = time requested = 1 minute

p(T ≤ 1) = 0.3624

Hence, the probability that a service time is less than or equal to one minute is p = 0.3624, which means 36.24%.

1. is 4 and 2. is 3

step-by-step explanation:

so if you look at the first one you see that 1 is to 4 and 2 is to 8 and so on, so you can see for every 1 there is a times 4 so if it were 3 then it would be 3*4 and it is 12

for number 2 it is 3 because 1 is to 3 and 2 is to 6 so for every 1 there is 3 so if it were 3 then there would be 3*3 = 9