Question 741644
Probability of a NON-yellow card = {{{(number of NON yellow)/(total number)}}},


where NON-yellow = 5+7=12
Total = 5+6+7 = 18


{{{Probability = (5+7)/18 = 12/18 = 2/3}}}.


Dr. Robert J. Rapalje, Retired
Seminole State College of Florida