Page 208 - Math Course 3 (Book 2)

Permutations and Combinations

Your Turn!

Combinations and Probability

At a factory, there are 10 union workers, 12 engineers, and 5 foremen. The company needs 6 of these
workers to attend a national conference. How many ways could the company choose the 6 workers?

A. 7200
B. 296,010
C. 27
D. 500

Answer

If the workers are chosen randomly, what is the probability that 3 union workers, 2 engineers, and 1 foreman
are selected?
A. 6
11

B. 40
299
C. 1
4

D. 1
2
Answer

Skill Practice!

Determine whether each situation involves a permutation or combination. Explain your reasoning.
1. dinner guests seated around a table

2. a pattern of different widths of bars and spaces for a bar code

3. selecting two yellow marbles out of a sack of yellow and blue marbles

4. placing one can of each of 15 different types of soup along a store shelf

200