Question

Let X represent the difference between number of heads and the number of tails obtained when...

Let X represent the difference between number of heads and the number of tails obtained when a fair coin is tossed 3 times.

a)Find P(X-1)

b)Find E(X)

c)Find Var(X)

Math   Statistics-And-Probability   
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Answer #1

Possible outcomes are (HHH),(HHT),(HTH),(HTT),(THH),(THT),(TTH),(TTT)

-3 -1 1 3

b)

c)

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