Suppose we have a fair spinner with the numbers 1,2, and 3 on it. Let X be the number of spins until the first 3 occurs. Assuming that the spins are independent, the pdf of X is (in the picture) what is the MGF of X?

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Suppose we have a fair spinner with the numbers 1,2, and 3 on it. Let X be the number of spins until the first 3 occurs. Assuming that the spins are independent, the pdf of X is (in the picture)

what is the MGF of X?

if a = 1,2, 3, ...
f(x) =
0,
elsewhere
2 13
Transcribed Image Text:if a = 1,2, 3, ... f(x) = 0, elsewhere 2 13
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