An angle grinder, also known as a grinder or disc grinder, is a hand-held power tool used for cutting, grinding, and polishing. The power unit of an angle grinder can be an electric …
nCr = n! / (r! × (n – r)!) Factorial i.e., n! is the product of all positive integers from 1 to "n.". For example, if we have 3 letters A, B, and C, and we want to arrange them in different ways, we can use the nPr formula. Using the nPr formula we get the answer 6 for this arrangement.