AFDA_W18_Flashcardizz Permutations and Combinations

Front

What is a permutation?

Back

A permutation is an arrangement of objects in a specific order. The order matters in permutations.

Front

What is a combination?

Back

A combination is a selection of items from a larger set where the order does not matter.

Front

How many ways can 4 classes be chosen from 6 different classes?

Back

15 ways (using combinations: 6C4 = 15).

Front

Is the order of arrangement important in combinations?

Back

No, the order of arrangement is not important in combinations.

Front

How many different arrangements can be made with the letters of the word 'CHAIR'?

Back

120 arrangements (5! = 120).

Front

What is the formula for combinations?

Back

The formula for combinations is nCr = n! / (r!(n-r)!), where n is the total number of items, and r is the number of items to choose.

Front

What is the formula for permutations?

Back

The formula for permutations is nPr = n! / (n-r)!, where n is the total number of items, and r is the number of items to arrange.

Front

How many ways can 2 jellybeans be chosen from 15 unique jellybeans?

Back

105 ways (using combinations: 15C2 = 105).

Front

Which of the following is an example of a combination? Choose 4 students in a class committee.

Back

This is a combination because the order of selection does not matter.

Front

How many different ways can 3 players be selected from a group of 10 individuals?

Back

This is a combination problem; the order does not matter.