The length of time for one individual to be served at a cafeteria is a random variable having an exponential distribution with a
mean of 4-minutes. what is the probability that a person is served is less than 3-minutes on at least 4 of the next 6 days?
1 answer:
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First, simplify
Second, simplify
Third, simplify
Fourth, regroup terms. / Your problem should look like: 6 -
Fifth, multiply both sides by 7. / Your problem should look like: 42 - x = 126
Sixth, subtract 42 from both sides. / Your problem should look like: -x = 126 - 42
Seventh, simplify 126 - 42 to 84. / Your problem should look like: -x = 84
Eighth, multiply both sides by -1. / Your problem should look like: x = -84
Answer: x = -84