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Find the probability that a number selected from the numbers 1 to 25 which is not a prime number when each of the given number is equally likely to be selected.

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Number of favourable outcomes=(1,4,6,8,9,10,12,14,15,16,18,20,21,22,24,25) i.e 16 Total number of outcomes=25 (numbers from 1 to 25 ) Probablity of selecting number which is not a prime number from 1 to 25=(Number of favourable outcomes)/(Total number of outcomes) => 16/25
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