# What is a Probability Distribution?

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6. Determine whether each of the distributions given below represents a probability distribution. Justify your answer.

(a)

x 1 2 3 4

P(x) 1/4 1/12 1/3 1/6

(b)

x 3 6 8

P(x) 0.2 2/5 0.3

(c)

x 20 30 40 50

P(x) 3/10 -0.1 0.5 0.3

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##### Solution Summary

This solution explains how to determine if certain distributions are probability distributions.

##### Solution Preview

Answer: None of 3 represents a probability distribution.

A) ...

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