Exponential Probability Between 12:00 pm and 1:00 pm, cars arrive at Citibank’s drive-thru at the rate of 6 cars per hour (0.1 car per minute). The following formula from probability can be used to determine the probability that a car will arrive within t minutes of 12:00 PM. F ( t ) = 1 − e − 0.1 t (a) Determine the probability that a car will arrive within 10 minutes of 12:00 PM (that is, before 12:10 PM). (b) Determine the probability that a car will arrive within 40 minutes of 12:00 PM (before 12:40 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 50 % .
Exponential Probability Between 12:00 pm and 1:00 pm, cars arrive at Citibank’s drive-thru at the rate of 6 cars per hour (0.1 car per minute). The following formula from probability can be used to determine the probability that a car will arrive within t minutes of 12:00 PM. F ( t ) = 1 − e − 0.1 t (a) Determine the probability that a car will arrive within 10 minutes of 12:00 PM (that is, before 12:10 PM). (b) Determine the probability that a car will arrive within 40 minutes of 12:00 PM (before 12:40 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 50 % .
Solution Summary: The author calculates the probability of a car arriving between 12.00 PM and 1.00 pm by substituting the above values in the function given.
Exponential Probability
Between 12:00 pm and 1:00 pm, cars arrive at Citibank’s drive-thru at the rate of 6 cars per hour (0.1 car per minute). The following formula from probability can be used to determine the probability that a car will arrive within
minutes of 12:00 PM.
(a) Determine the probability that a car will arrive within 10 minutes of 12:00 PM (that is, before 12:10 PM).
(b) Determine the probability that a car will arrive within 40 minutes of 12:00 PM (before 12:40 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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