Permutations and Combinations Part 2

Total 3 digit number =900
Divisible by 3=300‌‌ (Using ‌

900

3

=300 )
Divisible by 4=225‌‌ (Using ‌

900

4

=225 )
Divisible by 3 & 4=108,...
(Using ‌

900

12

=75 )
Number divisible by either 3 or 4
=300+2250−75=450
We have to remove divisible by 48 ,
144,192,....,18 terms
Required number of numbers =450−18=432