Practice Problems for the Lander Math Contest
Module 9, Problems (26-28)
26) How many ways can 4 people be chosen from a group of
27) How many 5 letter “words” can be arranged from the first
7 letters of the alphabet? [Note: “words” can use each letter at
28) Fill in the blank: The number of permutations nPk is
______ times larger than the number of combinations nCk.