A store donated 2 1/4 cases of crayons to a day care center.Each case holds 24 boxes of crayons ; each box holds 8 crayons, How
1 answer:
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Answer: 0.3679
Step-by-step explanation:
The cumulative distribution function for exponential distribution is :-
, where
is the mean of the distribution.
Given : A mean length of waiting time equal minutes
i.e. Mean number of calls answered in a minute
Now, the proportion of callers is put on hold longer than 2.8 minutes is given by :_
Hence, the proportion of callers is put on hold longer than 2.8 minutes = 0.3679