**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

9 people?

**27)** How many 5 letter “words” can be arranged from the first

7 letters of the alphabet? [Note: “words” can use each letter at

most once.]

**28)** Fill in the blank: The number of permutations nPk is

______ times larger than the number of combinations nCk.