There are 120 boxes, each of which contains any number of tennis balls, from a minimum of 130 to a maximum of 155. Maximum number of boxes containing minimum number of balls is atleast?

Hi Namit Bhargava,
A box may contain any number of balls from 130 to 155, that is a total of 26 possibilities are there.
If each of these possibility appear for 4 times then we get a total of 26*4 = 104 and we are left with 16 possibility
So we can say that 16 possibility appear 5 times each and 10 possibility appear 4 times each.
Hope this helps!