Let X be the lifetime of a certain type of electronic device (measured in hours). The...

Question

Question

Let X be the lifetime of a certain type of electronic device (measured in hours).

The probability density function of X is

f(x) =10/x^2 , x > c

0, x ≤ c

(a) Find the value of c that makes f(x) a legitimate pdf of X.

(b) Compute P(X < 20).

Answer 1

Answer #1

Answer 2

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