5. A bag contains some square cards. A prime number between 1 and 100 has been writeen on each card. Find the probabiilty of getting a card that the sum of the digits of prime number written on it, is 8.
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there are 25 prime no's between 1 and 100
They are 2,3,5,7,11,13,17,19,29,23,31,37,41,43,47,51,53,59,61 67,69,71, 73,79,83,87,89 ,97
The possible outcome with sum 8 are
17,53,71
P=3/25 =0.12 or 12%
Hope it helps you
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