Mathematics, 20.04.2020 17:18 anthonylopez1

Because of the relatively high interest rates, most consumers attempt to pay off their credit card bills promptly. However, this is not always possible. An analysis of the amount of interest paid monthly by a bank's Visa cardholders reveals that the amount is normally distributed with a mean of 28 dollars and a standard deviation of 7 dollars.

A. What proportion of the bank's Visa cardholders pay more than 30 dollars in interest?

Proportion =

B. What proportion of the bank's Visa cardholders pay more than 38 dollars in interest?

Proportion =

C. What proportion of the bank's Visa cardholders pay less than 19 dollars in interest?

Proportion =

D. What interest payment is exceeded by only 20% of the bank's Visa cardholders?

Interest Payment =

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