Hello everyone. Can someone please point me in the right direction on how to solve the following problem:
How many different 3 letter initials are there that have at least an A in it?
How many total 3 letter initials are there possible?
How man 3 letter initials contain no A are there possible?
How do I find how many 3 letter initials that contains A? Would it be easier to find how many 3 letter initials that don't contain an A and subtract that number from the total possibilities?