Combinations

Question 0

Permutations deal with?

Answer 0

Rank
Place
Order

• order is significant

Question 1

How do you find the total number of combinations?

Answer 1

Multiply the number of choices in each group

3 fruit • 2 entrees • 3 deserts = 18 possible outcomes

Question 2

Permutation

Out of 5 horses, what can be the total possible ranks at the finish line?

Answer 2

• If Horse 5 finishes first
• 4 horses can finish second
• 3 horses can finish third
• 2 horses can finish fourth
• 1 horse can finish fifth

5 x 4 x 3 x 2 x 1 = 120

Question 3

How is a factorial represented?

Answer 3

5!

Means 5 x 4 x 3 x 2 x 1