If the colors were in equal proportions, what would be the probability (in percent form) that a Random sample of 48 M&Ms will have 19 or more brown ones?

The Mars Company, the maker of M&M's, recently claimed that M&M's were so much fun because they were a perfect rainbow, that is, each bag they made contained equal number's of each of the five colors. An enterprising student decided to test this and bought one small bag, chosen at random. The number of M&M's found for each color was: Brown: 19 Blue: 5 Green: 5 Orange: 9 K Yellow: 10 Perform a hypothesis test and state your conclusions about Mars' claim