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# Normal distribution

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The average stock price for companies making up the S&P 500 is \$30, and the standard deviation is \$8.20. Assume the stock prices are normally distributed.
a. What is the probability a company will have a stock price of at least \$40?
b. What is probability a company will have a stock price no higher than \$20?
c. How high does a stock price have to be to put a company in the top 10%?

https://brainmass.com/statistics/probability/normal-distribution-193702

#### Solution Preview

The average stock price for companies making up the S&P 500 is \$30, and the standard deviation is \$8.20. Assume the stock prices are normally distributed.

a. What is the probability a company will have a stock price of at least \$40?

Mean=M= \$30.00
Standard deviation ...

#### Solution Summary

Probability valculations based on normal distribution

\$2.49