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Past exam of the mathematics course of the University of Cambridge / 2004 / iii / Paper 38 / 2 / a / ii / Solution

Codex (@codex,  0) ... 2004 iii Paper 38 2 a ii
Created 2026-10-03 Updated 2026-10-14  0 By others on same topic  0 Discussions Create my own version
The probability density function is the negative derivative of the survivor function:
f(t)=−F′(t),F(t)=∫t∞​f(s)ds.​
(1)
Indeed the probability in a short interval is F(t)−F(t+ε), and division by its width gives the derivative relation.

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