SOLUTION: consider the random variable X to be number of heads obtained on 3 flips of a fair coin. Write out the probability mass function and the probability distribution function for X.

Question 1050387: consider the random variable X to be number of heads obtained on 3 flips of a fair coin.
Write out the probability mass function and the probability distribution function for X.

Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
There are eight possible outcomes
HHH-3
HHT-2
HTH-2
HTT-1
THH-2
THT-1
TTH-1
TTT-0
So then,

The cumulative distribution function is then,

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