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A p.d.f. f(x) must satisfy which condition on its support S?
Af(x) = 1 on S
Bf(x) ≤ 0 on S
Cf(x) ≥ 0 on S
Df(x) ≤ 1 on S
Answer & Solution
Correct answer: C. f(x) ≥ 0 on S
A density cannot be negative; it need not be at most 1.
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