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Question 1 of 3
Kathy, Alice and Mary have some marbles.
The ratio of the total number of marbles Alice and Mary have to the number of marbles Kathy has is 15:28.
Also, the ratio of the number of marbles Alice has to the total number of marbles that Kathy and Mary have is 9:34.
If Mary has 36 marbles, how many marbles do they have altogether?