Question

An integer is choosen at random between 1and 100.find the probability that it is: ( i) divisible by8(ii) not divisible by8

Answer 1

total 98 integer lie between 1 and 100

out of which 12 are divisible by 8

like 8,16,24,32,40,48,56,64,72,80,88,96

so probability divisible by 8 = 12/98. = 6/49


probability not divisible by 8 = 1-(6/49) = 43/49