What is the probability that a number being picked from 1 to 100 is divisible by 3 but not by 9?
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total number of such numbers from 1 to 100 :-
these numbers are all the multiples of 9 from 1 to 100 these numbers are also dvisble by 3 .
there have 11 multiples of 9 from 1 to 100
these are 9,18,27,36,45,54,63,72,81,90,99
so probablity = 11/100
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