Specify the number of ways to perform the task described Give your answers using P n r or C n r notation The key in recognizing whether a problem involves permutations or combinations is deciding whether order is important In order to open your garage door you must enter a two digit code on a keypad with numbers 0 9 Each number may not be used more than once and the order that you enter the numbers is important The number of ways to perform the task is Do not evaluate