Question

Professor shortcut records his grades using only his students first and last initials. What is the smallest class size that will definetly force Pro . to use a different system

Answer 1

Explanation:

There are 26 possibiliteis of the first and last initials. So there are
`26* 26` different initials.

So the smallest class size to ensure the Prof to use different system is
`(26* 26)+1` since there must be two people in this class with the same first and last initials.