Question
Zara, Marion, Albert and Nora shared some marbles. Zara and Marion took 15 of the total number of marbles while Albert and Nora took the rest. Marion had thrice as many marbles as Zara and Nora had 12 marbles. Given that Nora had twice as many marbles as Marion, how many marbles were there altogether?
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Zara, Marion, Albert and Nora shared some marbles. Zara and Marion took 15 of the total number of marbles while Albert and Nora took the rest. Marion had thrice as many marbles as Zara and Nora had 12 marbles. Given that Nora had twice as many marbles as Marion, how many marbles were there altogether?