Question

20 tickets, on which numbers 1 to 20 are written, are mixed thoroughly and then a ticket is drawn at random out of them. The probability that the number on the drawn ticket is a multiple of 3 or 7 is​

Answer 1

Answer:

Probability of getting multiple of 3 = 6/20 = 3/10

Probability of getting multiple of 7 = 2/20 = 1/10

Answer 2

Answer:

$\huge\frak\pink answer$

( i ) a multiple of 3 or 7

multiple of 3 or 7 are - 3,6,9,12,16,18

7,14

now, total=8, no. of tickets =20

P(E multiple of 3 or 7) = 8/20

= 2/5

( ii ) a prime number

prime no. between 1 and 20 are - 2,3,5,7,11,13,17,19

P ( E ) = 8/20

= 2/5

Hope this helps☺✌