Duration: 13:35
Posted: Apr 27, 2015

Feb 11, 2021 · Combination with Repetition formula. If we choose a set of r items from n types of items, where repetition is allowed and the number items we ...

Duration: 12:32
Posted: Nov 26, 2020

Oct 6, 2012 · Suppose we have three kinds of fruits available and we are picking three fruits in total where repetition is allowed. Let the fruits be apples, ...

Duration: 22:46
Posted: Sep 12, 2021

Selection with Repetition. The permutation and combination question we have done so far are basically about selecting objects. You have n objects and select ...

Theorem: The number of ways to fill r slots from n catgories with repetition allowed is: C(r + n − 1, r) = C(r + n − 1, n − 1). • In words, the counts are: C ...

Nov 16, 2011 · Basically I'm trying to understand how one derives the formula C(r + n - 1, n - 1) to solve for this type of problem. I'd appreciate any and all ...