If random variable X counts the number of coin flips to get a Tail, then it...

Question

Question

If random variable X counts the number of coin flips to get a Tail, then it has the following PDF

x	1	2	3	4	...	k
f ( x )	2/3	2/9	2/27	2/81	...	2/3^k

What is P ( x ≥ 4 )

Answer choices:

8/27

2/27

26/27

None of these

1/27

Answer 1

Answer #1

solubion: - Х 2 3 4 k 2 2 2 P(x) 2 3 6 27 8) 3k LET US:) So, Plx34) = |-|Plx=1) + PlX = ?) + PIX = ?)? (Extel a 22 2 - + t 22

Answer 2

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