For the normal distribution described in Exercise 7.12, what is the probability that a randomly selected tax

Question:

For the normal distribution described in Exercise 7.12, what is the probability that a randomly selected tax preparation customer would have paid a fee
a. Between $70 and $80?
b. Under $60?

c. Over $90?

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...