Permutations and Combinations

This section introduces formulas for combinations and permutations, which are helpful in computing probabilities.

Question 1 out of 4.
Order counts in

 permutations

 combinations


Question 2 out of 4.
A pizza restaurant has 5 types of toppings. You are going to choose 2 toppings. How many possible sets of 2 toppings are there for you to choose from?

Question 3 out of 4.
You flip a coin and then roll a die. What is the probability of obtaining a head on the coin and a 4 on the die?

Question 4 out of 4.
You are going to select first and second place prizes out of 5 entries. How many possible outcomes are there?