Permutations and Combinations

Front

What is a permutation?

Back

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

Front

What is a combination?

Back

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

Front

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

Back

Front

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

Back

Front

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

Back

Front

In how many ways can you choose 3 students from a group of 10?

Back

Front

What is the difference between permutations and combinations?

Back

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

Front

How many ways can you arrange 4 trophies on a shelf?

Back

Front

If you have 10 different shirts and want to choose 2 to wear, how many combinations can you make?

Back

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.