Describe how and why the formula for permutations differs from the formula for combinations.

Answer: In permutations order matters, while in combinations it does not.

Step-by-step explanation:

Permutations are used to calculate the number of ways something or group of things whether for example cricket bats, computers, phones etc can be ordered but the condition that is very important is that the order is important. The function on the calculator is nPr. From n

Combinations are similarly calculated like the nPr but instead, the order of selection does not matter. nCr. From n choose r where it does not matter what the order goes like. No restrictions.