Question

Slips of number 1 to 20 are put in a bowl, find the probability of: a) Slip taken out is of multiple of 3. b) Slip taken out is of an even number. c) Slip taken out is of prime numbers. d) Slip taken out of factors of 20.​

Answer 1

Answer:

a) 3 ke table me

3,6,9,12,15,18 another is 21 but is not under 1 to 20

they have 6 multiple under 1 to 20

so, probablity of slip ball= 6/20

b) we know that even no is multiple of 2

so we need to find multiple of 2under 1 to 20

2,4,6,8,10,12,14,16,18,20

so there have 10 even no

probablity=20/10

=2

c) we know that prime no are those no who divied by own and one

so, there have 1,3,5,7,11,13,17,19

so, there have 8 prime no

probablity=8/20

=4/10

=2/5

d) the factor of 20

=2, 4,5,10 etc

so, there have 4facter

probablity=4/20

=2/10

=1/5