Question
Let X1 denote the time (hr) it takes to perform a
first task and X, denote the time it takes to perform
a second one. The second task always takes at
least as long to perform as the first task. The
joint pdf of these variables is
r(x1, 42)
(r1,42) = { 2(* + x2)
otherwise
15 x 5 I50
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Transcribed Image Text

Let X1 denote the time (hr) it takes to perform a first task and X, denote the time it takes to perform a second one. The second task always takes at least as long to perform as the first task. The joint pdf of these variables is r(x1, 42) (r1,42) = { 2(* + x2) otherwise 15 x 5 I50

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