80,76.5,69.5,59,48,27.5

445,444,436,409,343,220

45,15,6,3,2,1,4

1,4,12,30,68,148,304

155,151,139,119,90,55

A bag contains 4 red, 5 yellow or 6 pink balls. Two balls are drawn at random. What is the probability that none of the balls drawn are yellow in colour