Question

a two digit number selected at random find the probability that it is multiple of 4 but not divisible by 5 ​

Answer 1

Total number of two digit numbers = 90

Total number of two digit numbers which are multiple of 4 = 22

Out of this there are 4 numbers which are also divisible by 5 ( 20, 40, 60, 80 ).

Therefore, total number of two digit numbers which are multiple of 4 but not divisible by 5 =22 - 4 = 18

Required probability = 18 / 90

= 1 / 5

HOPE IT HELPS YOU.....

Answer 2

Answer:

Total number of two digit number =90

⇒ Total number of two digit number which is divisible by 3=30

Out of this there are 6 numbers divisible by 15 (15,30,45,60,75,90) which are also divisible by 5.

⇒ Total two digit number which are divisible by 3 but not 5=30−6=24

⇒ Required probability =

90

24

=

15

4