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anna filled completely four identical cups with different liquids. three of the cups were filled with freshwater from different locations on land and one cup was filled with ocean water. the liquid in the four cups was boiled completely. the table below shows the mass of salt obtained on boiling the liquids completely.

cup mass of salt (in gram)
1 25
2 18
3 35
4 29
into which of these cups did anna most likely fill ocean water?

cup 1
cup 2
cup 3
cup 4

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