USING NORM.DIST An investment broker reports that the annual returns on common stocks are approximately normally distributed with a mean return of...

USING NORM.DIST

An investment broker reports that the annual returns on common stocks are approximately normally distributed with a mean return of 12.4 percent and a standard deviation of 20.6 percent. Find the probability that a randomly selected common stock:

a) will give a positive annual return.

b) will give a loss of at least 10 percent.