The answers are 175cm2 516cm21548cm2 4644cm2
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Answer:
P = 21%
Step-by-step explanation:
We look for the percentage of employees who are not more than 30 years old.
This is:
Where x is the number of new employees who are not over 30 years old and n is the total number of new employees.
We do not know the value of x or n. However, the probability of randomly selecting an employee that is not more than 30 years old is equal to
Then we can solve this problem by looking for the probability that a new employee is not more than 30 years old.
This is:
Then we find the z-score
We know that:
μ = 38 years
years
So
Then
By symmetry of the distribution
Looking in the normal standard tables
Finally P = 21%