Respuesta :
I'm guessing 1/3 of 3/5 is what you mean
1/3 of 3/5=1/3 times 3/5=3/15=1/5
1/5 of class has long brown hair and green eyes
1/3 of 3/5=1/3 times 3/5=3/15=1/5
1/5 of class has long brown hair and green eyes
This is probabilistic "and". Knowing this you multiply the probabilities. So (3/5)*(1/3)=(3/15).