ProbabilityHard
Question
If a, b and c are three numbers (not necessarily different) chosen randomly and with replacement from the set {1, 2, 3, 4, 5}, the probability that (ab + c) is even, is -
Options
A.
B.
C.
D.
Solution
a, b & c are three numbers
set (1, 2, 3, 4, 5)
sample space = 53
ab + c = even
favourable case = 27 + 12 + 12 + 8 = 59
Probability to getting even no. =
set (1, 2, 3, 4, 5)
sample space = 53
ab + c = even
favourable case = 27 + 12 + 12 + 8 = 59
Probability to getting even no. =
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