help please in Statics and probabilty Q/The time between calls to a corporate office is exponentially distributed with a  mean of 10 minutes. (a) What is the probability that there are more than three calls in one-half hour? (b) What is the probability that there are no calls within one-half hour? (c) Determine x such that the probability that there are no calls within x hours is  0.01. (d) What is the probability that there are no calls within a two-hour interval?

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
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help please in Statics and probabilty

Q/The time between calls to a corporate office is exponentially distributed with a 
mean of 10 minutes.
(a) What is the probability that there are more than three calls in one-half hour?
(b) What is the probability that there are no calls within one-half hour?
(c) Determine x such that the probability that there are no calls within x hours is 
0.01.
(d) What is the probability that there are no calls within a two-hour interval?

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