Question $5$

A financial analyst is thinking of changing the composition of her stock market portfolio. Last year, last year the return on the stock in the portfolio was normally distributed with a mean of $10$ and a standard deviation of $2.$ What is the probability that:

The return on a single stock is less than $9?$

$0\mathrm{.}4081$

$0\mathrm{.}3085$

$0\mathrm{.}2352$