Posted by **Sam** on Monday, October 8, 2012 at 11:00pm.

Assume that the box contains balls numbered from 1 through 28, and that 3 are selected. A random variable X is defined as 1 times the number of odd balls selected, plus 2 times the number of even.

How many different values are possible for the random variable X? I know that is four. But I cannot fill out the probability density function.

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