How does one solve problems using Permutations and Combinations?
One of the hardest parts of problem solving is to determine whether the solution requires a permutation or combination. Determining ‘n’ and ‘r’ can also be difficult. The following provides a few tips that may help. 1) Determine if order is important. 2) Look for restrictions. 3) Determine if any repetition must be eliminated. 4) Check to see if it may be easier to subtract the converse. 5) Try to build a solution based on an example you already know.
