Permutations & Combinations

Permutations & Combinations

Assessment

Flashcard

Mathematics

9th - 11th Grade

Practice Problem

Hard

Created by

Wayground Content

Used 1+ times

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15 questions

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1.

FLASHCARD QUESTION

Front

What is a permutation?

Back

A permutation is an arrangement of objects in a specific order. The order matters.

2.

FLASHCARD QUESTION

Front

What is a combination?

Back

A combination is a selection of objects where the order does not matter.

3.

FLASHCARD QUESTION

Front

How do you calculate permutations of n objects taken r at a time?

Back

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

4.

FLASHCARD QUESTION

Front

How do you calculate combinations of n objects taken r at a time?

Back

The formula is C(n, r) = n! / (r! * (n - r)!).

5.

FLASHCARD QUESTION

Front

What is the factorial of a number?

Back

The factorial of a number n (denoted as n!) is the product of all positive integers up to n.

6.

FLASHCARD QUESTION

Front

If you have 5 books and want to arrange them on a shelf, how many ways can you do this?

Back

120 ways (5! = 5 x 4 x 3 x 2 x 1 = 120).

7.

FLASHCARD QUESTION

Front

In how many ways can you choose 3 fruits from a basket of 10?

Back

120 ways (C(10, 3) = 10! / (3! * 7!) = 120).

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