Question

An integer is chosen at random from 1 to 100 find the probability of it is divisible by 9 and not divisible by 9

Answer 1

an integer divisible by 9 are:9,18,27,36,45,54,63,72,81,90 &99
no.of favourable outcomes integer to divisible by9=11
no.of favourable outcomes toget no.isn't divisible by9 =100-11=89
no.of all possible outcomes=100
p(integer divisible by9)=11/100 &p(not divisible by9)=89/100

Answer 2

hey..

The numbers divisble by 9 are 9,18,27,36,45,54,63,72,81,90,99

No.of favourable outcomes = 11
Total no.of possible outcomes = 100

P(D) = 11/100

probability of it not divisible by 9 is 89/100