# Aptitude - Probability - Discussion

Discussion Forum : Probability - General Questions (Q.No. 1)

1.

Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5?

Answer: Option

Explanation:

Here, S = {1, 2, 3, 4, ...., 19, 20}.

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

P(E) = | n(E) |
= | 9 | . |

n(S) |
20 |

Discussion:

106 comments Page 11 of 11.
Mani said:
8 years ago

Where this 6 gone in the event?

Anonymous said:
8 years ago

The correct answer is 9/20.

Kiruba said:
1 decade ago

Thanks sneha. Ans is 9/20.

Thrideep said:
7 years ago

I think The answer is 3/4.

Siva said:
6 years ago

How come 4/20 & 6/20?

Albert said:
1 decade ago

Final answer is 9/20

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