The frequency table shows the number of cars that 65 families have.
|Number of Cars||1||2||3||4|
Find the mean number of cars per family.
This data can be expressed as a probability distribution for the discrete random variable as shown. Find the value of , , , and .
Calculate the expected value of .
The table shows the probability distribution of a fair six-sided die. Determine .
The discrete random variable has the shown probability distribution.
Find the value of .
Hence, determine the expected value of .