Permutation Concepts Quiz

What is the formula for calculating permutations of n taken r?

• n factorial times r factorial

• n plus r factorial

• n minus r factorial

• n factorial divided by (n minus r) factorial

What is the value of P(5, 2) using the permutation formula?

• 20

• 40

• 30

• 10

Which of the following is an alternative method to calculate P(5, 2)?

• Using the division of numbers

• Using the difference of numbers

• Using the product of two consecutive numbers starting from 5

• Using the sum of numbers

If P(n, 5) equals 720, what is the value of n?

• 8

• 5

• 6

• 7

What is the first step in solving for n when given P(n, 5) = 720?

• Divide 720 by 5

• Cross multiply n factorial with 720

• Add 5 to 720

• Subtract 5 from 720

In the equation n = 6(n - 5), what is the value of n?

• 5

• 7

• 8

• 6

If P(6, r) equals 360, what is the value of r?

• 2

• 3

• 4

• 5

What is the factorial of 6?

• 840

• 720

• 360

• 120

How do you simplify 6 minus r factorial equals 2?

• Set 6 minus r equal to 4

• Set 6 minus r equal to 3

• Set 6 minus r equal to 2

• Set 6 minus r equal to 1

What is the result of dividing 720 by 360?

• 3

• 2

• 1

• 4