Front

What does the P stand for in nPr?

Back

Permutations

Front

How many ways can a club select a president, vice president, and a secretary from a group of 5 people?

Back

60

Front

Max’s cell phone uses a three-digit pin to unlock it. How many different possible ways can he make a pin number using the digits 0-9? No digits repeat.

Back

720

Front

How many ways can you listen to 3 songs from a CD that has 12 selections?

Back

1320

Front

How many ways can you arrange the letters in the word 'math'?

Back

24

Front

Define permutations in mathematics.

Back

Permutations refer to the different arrangements of a set of items where the order matters.

Front

What is the formula for calculating permutations of n items taken r at a time?

Back

The formula is nPr = n! / (n - r)!.

Front

If you have 4 different books, how many ways can you arrange them on a shelf?

Back

24 (4!)

Front

What is the difference between permutations and combinations?

Back

Permutations consider the order of items, while combinations do not.

Front

How many different ways can you arrange the letters in the word 'apple'?

Back

60 (5! / 2! for the two 'p's).