77.20 i think i did it in my head and with a caluclator
Answer:
i think it is a
Step-by-step explanation:
Answer:
6.A
7.C
8.E
Step-by-step explanation:
Answer:
b+3x^3
x+2y+2z+2
32a^5
Step-by-step explanation:
none needed [=
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 : 