1. Suppose that the longevity of a light bulb is exponential with a mean lifetime of...

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1. Suppose that the longevity of a light bulb is exponential with a mean lifetime of...

1. Suppose that the longevity of a light bulb is exponential with a mean lifetime of eight years. Find the probability that a light bulb lasts between 6 and 8 years.

a. 0.875

b. 0.125

c. 0.896

d. 0.104

2. At a 911 call center, calls come in at an average rate of one call every two minutes. Assume that the time that elapses from one call to the next has the exponential distribution.
Find the probability after a call is received, it takes more than three minutes for the next call to occur.

a. 0.5

b. 0.666

c. 0.223

d. 0.777

math Statistics-And-Probability

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Answer 1

Answer #1

In this AI 8 -X18 ArexP) The probability that alight bulbis lasts between 6 and 8 years is P(6< x <B) = 5 e28 78 -18 do 8/8

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