Permutation and Combination Flashcard

Front

What is the value of 5! ?

Back

120

Front

Define Permutation.

Back

An arrangement of objects in a specific order.

Front

Define Combination.

Back

A selection of items without regard to the order.

Front

What does the P stand for in nPr?

Back

Permutations

Front

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

Back

24

Front

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

Back

nPr = n! / (n - r)!

Front

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

Back

nCr = n! / [r!(n - r)!]

Front

If you have 10 books and want to arrange 3 on a shelf, how many arrangements are possible?

Back

720

Front

In how many ways can you choose 2 fruits from a basket of 5 different fruits?

Back

10

Front

What is the difference between permutation and combination?

Back

Permutation considers order; combination does not.