Probabilities are used to determine the chances of an event.
- The expected value is: 55.5
- The standard deviation is 22.52
<u>(a) The expected value</u>
This is the mean of the distribution, and it is calculated using:

So, we have:

Using a calculator, we have:

Hence, the expected value is: 55.5
<u>(b) The standard deviation</u>
This is calculated using:

Where:

So, we have:


So, we have:





Hence, the standard deviation is 22.52
Read more about expected values and standard deviations at:
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