Question

If X and Y represent waiting time and service time of customers in shopping mall, have joint destiny f(x, y) = kx; 0 ≤ y ≤ x ≤ 1, then the value of k is

A 3 Correct Answer Incorrect Answer
B 1 Correct Answer Incorrect Answer
C 4 Correct Answer Incorrect Answer
D 2 Correct Answer Incorrect Answer

Solution

The correct answer is A

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