1. For each of the following exercises, determine the range (output, possible values) of the random variable.

(a) A group of 1,000 people is tested for 0 RhD negative blood type. The random variable is the number of people who carry this blood type.

(b) Suppose 4 dice are rolled. The random variable is the sum of the numbers.

(c) The random variable is the number of rainy days in Atlanta in a year.

2. The sample space of a random experiment is {a, b, c, d, e, f}, and each outcome is equally likely (so P(X = x) = 1/ 6 for each outcome).

A random variable is defined as follows:

outcome a C d X 1.5 1.5Simple event Probability Gain r Live 0.999 $320 Die 0.001 -$15,680