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Compute the indicated probabilities in Problems 21 and 22 by referring to the fo

ID: 3209446 • Letter: C

Question

Compute the indicated probabilities in Problems 21 and 22 by referring to the following probability tree: P(M n S) P(R) P(N n R) P(S) A fair coin is tossed twice. Consider the sample space S = {HH, HT, TH, TT} of equally likely simple events. We are interested in the following events: E_1 = a head on the first toss E_2 = a tail on the first toss E_3 = a tail on the second toss E_4 = a head on the second toss For each pair of events, discuss whether they are independent and whether they are mutually exclusive. E_1 and E_4 E_1 and E_2 For each pair of events (see Problem 23), discuss whether they are independent and whether they are mutually exclusive. E_1 and E_3 E_3 and E_4

Explanation / Answer

23. A. Events E1 and E4 are independent because E1 is a head on first toss and E4 is a head on second toss, the result of both the tosses are independent of each other.

B. Events E1 and E2 are mutually exclusive because  E1 is a head on first toss and E2 is a tail on first toss. we cant get both head and tail in one toss

24. A. Independent

B. mutually exclusive

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