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MarileeGoldenman MarileeGoldenman
  • 04-06-2015
  • Mathematics
Answered

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 ?

A0.1
B0.2
C0.25
D0.3
E0.4

Verified Answer :

Anonymous Anonymous
  • 04-06-2015

Answer:   A) 0.1 

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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