Q:
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 ?
Answer & Explanation
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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