Question

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

8/15

2/5

9/20

1/2

Answer 1

B. 2/5

Explanation:

First we write down the numbers.

1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20.

Multiplies of three or five above are: 6,9,10,12,15,16,19,20 (there are 8)

So 8/20.

8/20 simplified is 2/5

So, it's B.