The number of days in a working week, N, for which a lift has a problem has the following distributi

Question: The number of days in a working week, N, for which a lift has a problem has the following distribution

x	0	1	2	3	4	5
Pr(X=x)	0.28	0.5	0.12	0.05	0.04	0.01

Suppose now that N has a binomial distribution with the same expected value as the distribution given in question 5 (a mean of 1.1). What is the probability of a problem-free week for the lift?

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The number of days in a working week, N, for which a lift has a problem has the following distributi

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