A bench can seat 4 people. How many seating arrangements can be made from a group of 10 people?How many distinct permutations can be formed from all the letters of each of the following words: (a) them, (b) unusual? Solution 1) 10 P 4 , where P stands for permutation 2) a) fact (4) = 24 ; fact - factorial b) fact (7) / fact (3) = 840.