ProbabilityHard
Question
A number is chosen at random from the numbers 10 to 99. A number whose product of digits is 12 will be called a good number. If he choose three numbers with replacement then the probability that he will choose a good number at least once is
Options
A.0.872
B.0.127
C.0.562
D.None of these
Solution
P(Product of digits) = 12
if 34, 43, 26, 62
P(A) =
P
= 
Probability = 1 -
if 34, 43, 26, 62
P(A) =
P
= Probability = 1 -
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