We do independent attempts each with success probability p. We keep repeating the attempts until 3 successes. Let X mark the number of necessary unsuccessful attempts.

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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We do independent attempts each with
success probability p.
We keep repeating the attempts until 3
successes.
Let X mark the number of necessary
unsuccessful attempts.
Determine
1
EV(X + 2)(X + 1)
(X+ 2)(X + 1)
(Expected value)
Transcribed Image Text:We do independent attempts each with success probability p. We keep repeating the attempts until 3 successes. Let X mark the number of necessary unsuccessful attempts. Determine 1 EV(X + 2)(X + 1) (X+ 2)(X + 1) (Expected value)
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