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n is an integer chosen at random from the set {5, 7, 9, 11 } p is chosen at random from the set {2, 6, 10, 14, 18} What is the probability that n + p = 23 ?
a. 0.1
b. 0.2
c. 0.25
d. 0.3
e. 0.4
Explanation: Each of the integers in the first set could be combined with any from the second set, giving a total of 4 x 5 = 20 possible pairs.Of these the combinations that could give a sum of 23 are (5 + 18), and (9 + 14)This means that the probability of getting a sum of 23 is 2/20 = 1/10
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