Exponential Probability Between 5:00 PM and 6:00 PM, cars arrive at Jiffy Lube at the rate of 9 cars per hour (0.15 car per minute). This formula from probability can be used to determine the probability that a car will arrive within t minutes of 5:00 PM: F ( t ) = 1 − e − 0.15 t (a) Determine the probability that a car will arrive within 15 minutes of 5:00 PM (that is, before 5:15 PM). (b) Determine the probability that a car will arrive within 30 minutes of 5:00 PM (before 5:30 PM). (c) What value does F approach as t becomes unbounded in the positive direction? (d) Graph F using a graphing utility. (e) Using INTERSECT, determine how many minutes are needed for the probability to reach 60 % .
Exponential Probability Between 5:00 PM and 6:00 PM, cars arrive at Jiffy Lube at the rate of 9 cars per hour (0.15 car per minute). This formula from probability can be used to determine the probability that a car will arrive within t minutes of 5:00 PM: F ( t ) = 1 − e − 0.15 t (a) Determine the probability that a car will arrive within 15 minutes of 5:00 PM (that is, before 5:15 PM). (b) Determine the probability that a car will arrive within 30 minutes of 5:00 PM (before 5:30 PM). (c) What value does F approach as t becomes unbounded in the positive direction? (d) Graph F using a graphing utility. (e) Using INTERSECT, determine how many minutes are needed for the probability to reach 60 % .
Solution Summary: The author calculates the probability of a car arriving between 5.00 PM and 6.00 PM by substituting the above values in the function given.
Exponential Probability
Between 5:00 PM and 6:00 PM, cars arrive at Jiffy Lube at the rate of 9 cars per hour (0.15 car per minute). This formula from probability can be used to determine the probability that a car will arrive within
minutes of 5:00 PM:
(a) Determine the probability that a car will arrive within 15 minutes of 5:00 PM (that is, before 5:15 PM).
(b) Determine the probability that a car will arrive within 30 minutes of 5:00 PM (before 5:30 PM).
(c) What value does
approach as
becomes unbounded in the positive direction?
(d) Graph
using a graphing utility.
(e) Using INTERSECT, determine how many minutes are needed for the probability to reach
.
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