Suppose that the time students wait for a bus can be described by a uniform random...

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Suppose that the time students wait for a bus can be described by a uniform random variable X, where X is between 20 minutes

math Statistics-And-Probability

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Answer 1

Answer #1

Solution :

Given that,

a = 20

b = 30

(A)P(c < x < d) = (d - c) / (b - a)

P(20 < x < 22) = (22 - 20) / (30 - 20)=0.2

probability=0.2

(B)P(x > c) = (b - c) / (b - a)

P(x > 22) = (30 -22) / (30 - 20)=0.8

probability=0.8

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Answer 2

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