2970 marbles? I think because you have 11 boxes and each contains 6 bags so 11*6==66 and then you know that in each bag (in total there is 66). So then you do 66*45 = 2970 marbles
I think because you have 11 boxes and each contains 6 bags so 11*6==66 and then you know that in each bag (in total there is 66). So then you do 66*45 = 2970 marbles
