# Normal distribution

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

$2.19