# Thread: Probability Distribution

1. ## Probability Distribution

A fair dice is thrown once. The random variable X is related to the number N thrown on the dice as follows. If N is even, then X is half N ; otherwise X is double N. Tabulate the probability distribution of X.

Please Help !

2. Originally Posted by creatively12
A fair dice is thrown once. The random variable X is related to the number N thrown on the dice as follows. If N is even, then X is half N ; otherwise X is double N. Tabulate the probability distribution of X.

Please Help !
What value of X do you get for each value of N? So what are the possible values of X? What values of N give those values? What are the probabilitities for those values of N?

Think about those questions and then join the dots.

If you need more help please post what you've done and say where you get stuck.

3. I couldn't understand part of the question where it says that X is related to the number, N, thrown on the dice, but still I computed the chances of x which came as 1 2 3 6 10, but after that I couldn't understand how to calculate its probabilities.

4. Originally Posted by creatively12
I couldn't understand part of the question where it says that X is related to the number, N, thrown on the dice, but still I computed the chances of x which came as 1 2 3 6 10, but after that I couldn't understand how to calculate its probabilities.
N = 1: X = 2.
N = 2: X = 1.
N = 3: X = 6.
N = 4: X = 2.
N = 5: X = .
N = 6: X = .

Now go back and re-consider the questions I asked.

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# "if n is even then x is half n; otherwise x is double n"

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