Permutations and Combinations

Question 1

What is nPr used for?

Accepted Answer

Permutations

Question 2

How many ways to arrange 3 books?

Accepted Answer

6

Question 3

True or false: Permutations are always larger

Accepted Answer

True

Question 4

What is 6C3?

Accepted Answer

20

Question 5

What is 6P3?

Accepted Answer

120

Question 6

How many ways to choose 3 out of 5?

Accepted Answer

10

Question 7

How many ways to choose 2 out of 4?

Accepted Answer

6

Question 8

How many ways to arrange 4 letters?

Accepted Answer

24

Question 9

Which formula is for permutations?

Accepted Answer

n!/(n-r)!

Question 10

How many ways to arrange 5 digits?

Accepted Answer

120

Question 11

Which formula is for combinations?

Accepted Answer

n!/r!(n-r)!

Question 12

What is 5P2?

Accepted Answer

20

Question 13

What is 4C2?

Accepted Answer

6

Question 14

What is 4P2?

Accepted Answer

12

Question 15

True or false: Combinations consider order

Accepted Answer

False

Question 16

What is 5C2?

Accepted Answer

10

Question 17

True or false: Order matters in permutations

Accepted Answer

True

Question 18

How many ways to choose 2 out of 6?

Accepted Answer

15

Question 19

What does nCr represent?

Accepted Answer

Combinations

Questions 19