# Probability: Probability distribution, Expected Value

Please help with the following problems.

Harvard University published the age profile of it's first time students. A random sample of 33 students has ten students in their thirties, fifteen students in their forties, five students in their fifties, and three students in their sixties. A student is selected randomly from the sample. Let X be the age of the selected student. Calculate the:

A) Probability that the student is of age 30

B) Probability that the student is of age 50 or 60

C) Probability distribution of X

D) Expected value of X

https://brainmass.com/statistics/probability/probability-probability-distribution-expected-value-14117

#### Solution Preview

Harvard University published the age profile of it's first time students. A random sample of 33 students has ten students in their thirties, fifteen students in their forties, five students in their fifties, and three students in their sixties. A student is selected randomly from the sample. Let X be the age of the selected student. Calculate the:

A) Probability that the student is of age 30

B) Probability that the student ...

#### Solution Summary

This solution provides calculations for probability and expected value.