Chapter 11, Problem 4PT

To determine

To find: The expected number of divers that would receive a ticket.

Answer to Problem 4PT

The expected number is 11.84.

Explanation of Solution

Given:

The tables are:

Race	White	Black	Hispanic	Other
Number of tickets	69	52	18	9

Race	White	Black	Hispanic	Other
Proportion	0.55	0.3	0.08	0.07

Calculation:

The sum can be calculated as:

  $\begin{array}{c}\text{Sum }=69+52+18+9\\ =148\end{array}$

The expected number of divers that would receive a ticket can be computed as:

  $\begin{array}{c}\text{Expected number }=148\times 0.08\\ =11.84\end{array}$

Thus, the correct option is (d).