Question

A integer is choose at random between 1 and 100 find the probability it is divisible by 8

Answer 1

1,2,3.......100
a=1
d=1
l=100
n={(l-a)/d}+1
n=100-1/1+1
n=100
total number of terms=100


8,16,...96
a=8
d=8
l=96
n=(96-8/8)+1
=11+1
=12
no of reema di visible by 8=12
p(getting ano di visible by 8)
=12/100
=3/25
if u dont know arithmatic progression pls count the estimate the probability by counting the number of terms and total number of terms
the answer will remain same