# Probability

Problem:

Complete probability and find the mean and standard dev.

x=250 P(x) = .40

x= 100 P(x) = .10

x= 250 P(x) = .20

x=400

https://brainmass.com/statistics/probability/probability-mean-standard-deviation-21511

#### Solution Preview

Solution. Denote the mean and standard deviation by a and b, respectively. Then we can complete the probability table as follows.

x=250 P(x) = .40 ...

#### Solution Summary

The expert completes the probability and find the mean and standard deviation.

$2.19