Permutations and combinations

Count arrangements when order matters and selections when it does not.

Standards:S-CP.B.9

Try it: three questions

Real questions from the practice bank. Tap an answer to check it.

Question 1 of 3

A school committee needs to select 3 students from a group of 8 volunteers to be President, Vice-President, and Secretary (each role is different). How many ways can the committee make this selection?

Question 2 of 3

A teacher is choosing 3 students from a group of 7 to be on a committee. How many different committees can be formed?

Question 3 of 3

A school committee needs to select 3 students from a group of 8 to attend a conference. How many different ways can this selection be made?

How this fits in

Permutations and combinations is one skill in the Statistics & Probability unit. Students read the unit lesson, then earn a bronze, silver, or gold medal on their last 10 answers. Medals never go down. A mastered unit comes back for review after 1, 3, 7, 16, and 35 days so it stays learned.

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