A ticket is drawn at random from pack of tickets numbered from 1 to 20. what is the probability that the ticket drawn has a number which is multiple of either 4 or 5
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S = {1,2,3,4,........,20}
E = {4,8,12,16,20,5,10,15}
P(E) = n(E)/n(S)
= 8/20
E = {4,8,12,16,20,5,10,15}
P(E) = n(E)/n(S)
= 8/20
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