Question

ticket numbers from 1 to 20 are mixed up together and then a ticket is drawn at random what is the probability that the ticket drawn as a number which is a multiple of 7 9 3

Answer 1

for 7 therefore total tickets =20-1=19
therefore multiple of 7 =2/19

now for the multiple of 3=6/19.

now for multiple of 9=2/19

Answer 2

9/20
In the given set of numbers
multiples of 3 are 3 6 9 12 15 & 18
multiples of 7 are 7 & 14
multiples of 9 are 9 & 18