In how many ways can the letters in the word 'Population' be arranged?
There are 10 letters in the word 'Population', with 3 'O's, 2 'P's, 2 'L's, 2 'A's and 1 'T'.
Therefore, the total number of ways the letters can be arranged is 10! / (3! * 2! * 2! * 2!) = 1,512,000.
So, the letters in the word 'Population' can be arranged in 1,512,000 ways.