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The question is listed below Exercise 1 (5+5 pts.). Ezrchangeabz'lity. 1. We have an urn with 10 red, 15 black, 10 blue, and 10 green

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Exercise 1 (5+5 pts.). Ezrchangeabz'lity. 1. We have an urn with 10 red, 15 black, 10 blue, and 10 green balls. We take a sample of 30 balls Without replacement, with order. Find the probability that the 4rd, 6th, 20th, and 23rd picks are of different colors. 2. Let X1,X2,X3,X5 be i.i.d. Exp(A) random variables. Find P(X1

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