he average price of shares of companies that belong to the S & P500 is $ 30 and the standard deviation is $ 8.20. Assume that stock prices are normally distributed.   1. What is the probability that the price of a company's stock is at most $ 45 ?   2. Of the total of 500 companies, how many companies are expected to have

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The average price of shares of companies that belong to the S & P500 is $ 30 and the standard deviation is $ 8.20. Assume that stock prices are normally distributed.

 
1. What is the probability that the price of a company's stock is at most $ 45 ?
 
2. Of the total of 500 companies, how many companies are expected to have prices between $ 25 and $ 40 ?
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