Question

Avery has 2 blue marbles. One sixth are blue. How many marbles does he have

Answer 1

He has 12 marbles. 

There you go

Answer 2

Avery would have 12 marbles because if 1/6 of the marble is blue that means 2 is 1/6 of all his marbles so that means 10 of the marbles are other colors so he has 12 marbles