Question
Olivia has twice the number of marbles as Barbara. Tammy has four times the number of marbles as Olivia. If Tammy has 576 marbles, how many marbles do the three girls have altogether?
2 m

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Olivia has twice the number of marbles as Barbara. Tammy has four times the number of marbles as Olivia. If Tammy has 576 marbles, how many marbles do the three girls have altogether?