The time until a chemical reaction is complete (in milliseconds) has the density function -x/100 f(x) = for x 2 0. 100 a) Determine the mean and variance of X. b) P(X > 200).

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The time until a chemical reaction is complete (in milliseconds) has the density function
-x/100
f(x) =
for x > 0.
100
a) Determine the mean and variance of X.
b) P(X > 200).
Transcribed Image Text:The time until a chemical reaction is complete (in milliseconds) has the density function -x/100 f(x) = for x > 0. 100 a) Determine the mean and variance of X. b) P(X > 200).
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