Theorem 2.10 Suppose X, Y, Xn are integrable. (i) If X = a a.s., then E(X N) = a, a.s. (ii) E(aX+bY|N) = aE(X\N) + bE(Y|N), a.s. (iii) If X < Y a.s., then E(X|N)< E(Y|N), a.s. (iv) |E(X\N)| < E(\X||N), a.s.

A First Course in Probability (10th Edition)
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Chapter1: Combinatorial Analysis
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Please prove i - iv

Theorem 2.10 Suppose X, Y,Xn are integrable.
(i) If X = a a.s., then E(X\N) = a, a.s.
— а,
(ii) E(aX +bY|N) = aE(X|N) + bE(Y|N), a.s.
(iii) If X < Y a.s., then E(X|N) < E(Y|N), a.s.
(iv) |E(X|N)| < E(\X||N), a.s.
Transcribed Image Text:Theorem 2.10 Suppose X, Y,Xn are integrable. (i) If X = a a.s., then E(X\N) = a, a.s. — а, (ii) E(aX +bY|N) = aE(X|N) + bE(Y|N), a.s. (iii) If X < Y a.s., then E(X|N) < E(Y|N), a.s. (iv) |E(X|N)| < E(\X||N), a.s.
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