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Tickets Numbered 1 To 20 Are Stirred Up And After That, A Ticket Is Drawn Indiscriminately. What Is The Probability Getting Ticket Drawn Has A Quantity Which Is A Difference Of 3 Or 5 ?

Answer»

Let, S = {1, 2, 3, 4, 19, 20}. 

Let E = event of getting a few of 3 or 5 = {3, 6, 9, 12, 15, 18, 5, 10, 20}.

P (E) = N (E)/n(S) = 9/20

Let, S = {1, 2, 3, 4, 19, 20}. 

Let E = event of getting a few of 3 or 5 = {3, 6, 9, 12, 15, 18, 5, 10, 20}.

P (E) = n (E)/n(S) = 9/20


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