Section II Assume that 90% of all light bulbs of a certain brand last longer than 750 hours. Suppose that light bulbs are selected indepen- dently and at random until finding the first light bulb that lasts at most 750 hours. Let X denote the number of light bulbs that must be selected. 10. (a) distripution of X (no explanation required). The rest of this problem will be graded on the basis of your answer to this part. Give the name of and parameter(s) associated with the

A First Course in Probability (10th Edition)
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Chapter1: Combinatorial Analysis
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Section II
Assume that 90% of all light bulbs of a certain brand last
longer than 750 hours. Suppose that light bulbs are selected indepen-
dently and at random until finding the first light bulb that lasts at most
750 hours. Let X denote the number of light bulbs that must be selected.
10.
(a)
distripution of X (no explanation required). The rest of this problem
will be graded on the basis of your answer to this part.
Give the name of and parameter(s) associated with the
Transcribed Image Text:Section II Assume that 90% of all light bulbs of a certain brand last longer than 750 hours. Suppose that light bulbs are selected indepen- dently and at random until finding the first light bulb that lasts at most 750 hours. Let X denote the number of light bulbs that must be selected. 10. (a) distripution of X (no explanation required). The rest of this problem will be graded on the basis of your answer to this part. Give the name of and parameter(s) associated with the
(b)
Find P(X = 11).
I
(c)
Find P(X < 11).
Transcribed Image Text:(b) Find P(X = 11). I (c) Find P(X < 11).
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