Question

Ticket numbered from 1 to 20 are mixed up together and then a ticket is drawn at a random . what was the probability that the ticket drawn has a number which is a multiple if 3 and 7?

Answer 1

Answer:

multiple of 3 is 3,6,9,12,15,18

multiple of 7 is 7,14

there are 8 possiblities and 20 occurence

so 8/20

4/10

2/5

Step-by-step explanation:

Answer 2

Answer:

0.5

Step-by-step explanation:

No. of tickets = 20 i.e from (1,2,3,.......,20) Multiples of 3 from 1 to 20 = 6 i.e. (3,6,9,12,15,18) Multiples of 5 from 1 to 20 = 5 i.e. (5,10,15,20) Then probability = (6+5-1)/20 = 10/20 = 1/2 = 0.5