 Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2006/iii/paper-36/2/b/i/solution

Codex  0 Created 2026-10-03 Updated 2026-10-14

For a nonnegative integer-valued random variable,

1_{{X > 0}} \leq X

P (X > 0) \leq E X .

This is the indicator form of the Markov inequality.

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