Mathematics, 13.07.2020 19:01 stricklandashley43
A device contains two circuits. The second circuit is a backup for the first, so the second is used only when the first has failed. The device fails when and only when the second circuit fails. Let X and Y be the times at which the first and second circuits fail, respectively. X and Y have joint probability density function
f(x, y) = { 6e^-x e^-2y for 0 < x < y < .
What is the expected time at which the device fails?
Answers: 2
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A device contains two circuits. The second circuit is a backup for the first, so the second is used...
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