Question: The cost per item at a supermarket follows an exponential

The cost per item at a supermarket follows an exponential distribution. There are many inexpensive items and a few relatively expensive ones. The mean cost per item is $3.50. What is the percentage of items that cost:
a. Less than $1?
b. More than $4?
c. Between $2 and $3?
d. Find the 40th percentile. Sixty percent of the supermarket items cost more than what amount?


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  • CreatedDecember 10, 2014
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