Hi tutor, A basket contains 3 red balls, 6 blue balls and 4 gray balls. two ball

Hi tutor,
A basket contains 3 red balls, 6 blue balls and 4 gray balls.
two balls are picked randomly.
calculate the probability that it is NEITHER red nor gray.
The basket have 3 red, 6 blue and 4 grey balls.Thus the probability that two balls are neither red nor grey=Probability that the two ball are blue52 = 5=13 × 12 2626×