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Statistics - Discrete Probability Distribution

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a. Find the value of "a" in the following discrete probability distribution:

x P(x)
-2 a
0 0.35
2 0.25

b. Determine whether or not the following is a probability distribution. Give a reason for your answers.
x P(x)
3 3/5
4 2/5
5 1/5
6 - 1/5

c. Determine whether or not the following is a probability distribution. Give a reason for your answer.

x P(x)
-1 1/4
0 1/2
1 1/4
2 1/4

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https://brainmass.com/statistics/probability/discrete-probability-distribution-example-problems-236388

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