Question

If the genotype frequencies start at 30 a, 20 b, and 50 b, what are the expected genotype frequencies after one generation of random mating?
a) 30 a, 20 b, 50 b
b) 40 a, 30 b, 30 b
c) 25 a, 25 b, 50 b
d) 35 a, 15 b, 50 b