There are 25 cards numbered from 1 to 25 one card is drawn at random what is probability that the number on this card I not divisible by 3
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8/25 is the answer @santhosh
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n(s) = 25
(A) = 17 (( remove 3 table ))
n(P) = 17/ 25
(A) = 17 (( remove 3 table ))
n(P) = 17/ 25
gauri9819singh:
If S={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25}
N(s)=25
I.let A be the event of getting not divisible by 3 no:A={1,2,4,5,7,8,10,11,13,14,16,17,19,20,22,23,25}
N(A)=17
N(A)
n(A)/n(S)=17/25
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