A credit card company has found that its average balance per customer is normally distributed with...
A credit card company has found that its average balance per
customer is normally distributed with a mean of $250 and a variance
of 2500.
a. Find the probability that the balance is over
$300
b. Find the probability that the balance is less than
$150
c. Find the value such that the probability of a
customer’s balance being less than this amount is 0.05
d. Determine the values of a and b such that P(a ≤ X≤
b) = 0.99
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A credit card company has found that its average balance per
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