7 If a person is randomly selected from a certain town the p

7) If a person is randomly selected from a certain town, the probability distribution for the number, x, of siblings is as described in the accompanying table.

Solution

The given table is not a probability distribution table. The summation of all the given probabilities is:

0.24+0.32+0.21+…+0.03

=0.99

The total probability should always be equal to 1.