Permutation and Combination Flashcard

Front

What does 10C5 mean?

Back

Combinations with 10 choices and 5 positions.

Front

How many ways can 125 juniors elect a president, vice president, and secretary?

Back

1906500 ways.

Front

If a bakery has 8 pies, how many ways can Ashlyn choose 3?

Back

56 ways.

Front

How many choices for a code that consists of 3 digits with choices 0 to 39?

Back

59280 choices.

Front

What method would you use to solve the election of president, vice president, and secretary from 125 juniors?

Back

Permutation.

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 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

How many ways can you arrange 5 books on a shelf?

Back

5! = 120 ways.