Question
Olivia put 384 marbles in three boxes Q, R and S. Box Q and Box R contained a total of 266 marbles. Box R and Box S contained a total of 241 marbles. How many marbles were there in Box Q and Box S altogether?


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Olivia put 384 marbles in three boxes Q, R and S. Box Q and Box R contained a total of 266 marbles. Box R and Box S contained a total of 241 marbles. How many marbles were there in Box Q and Box S altogether?