Lowell collects marbles and keeps these in the box. 3/10 of the marbles in a box are red and 2/5 of them are blue. if 9/10 of the marbles in a box are red, blue and green, what fraction of the marbles are green
what is asked? what are the given facts? what operation/s will be used? what is the number sentence? what is your solution? what is your answer?