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 : 
59/23 into a mixed number is 2 13/23
Answer:
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Step-by-step explanation:
Answer:

Step-by-step explanation:
Let the greatest common factor of
such that
and they are not all equal to zero,
is the common divisor of
and
. Therefore,
and 
You can write


The greatest common factor of
is given as

and

This happens because
is upper bounded because if
then 
for all
. Therefore, the set
has the greatest elements.
Taking
such that 
You can note that
and 
Therefore, the greatest common factor is 
Note: 