Answer:
A
Step-by-step explanation:
12/4=3
20/4=5
Answer:
27
Step-by-step explanation:
3(4-1)²
3(3)²
3 x 9
= 27
Answer: The mean number of checks written per day 
Standard deviation
Variance 
Step-by-step explanation:
Given : The total number of checks wrote by person in a year = 126
Assume that the year is not a leap year.
Then 1 year = 365 days
Let the random variable x represent the number of checks he wrote in one day.
Then , the mean number of checks wrote by person each days id=s given by :-

Since , the distribution is Poisson distribution , then the variance must equal to the mean value i.e. 
Standard deviation : 
Zina, weldon, delia, leisha, bento, charlotte
Answer:
f=regrfdfdgfgsghgs
Step-by-step explanation: