[ Text problems (other) ]

Sharik and Matroskin milked 10 liters of milk, poured it into two buckets, and carried it home. Sharik got tired and poured some of the milk from his bucket into Matroskin's bucket. As a result, Sharik had three times less milk, and Matroskin had three times more milk. How much milk did Matroskin end up with?

#
Let Sharik, before pouring the milk to Matroskin, pour it into a separate bucket. According to the condition, if this milk is added to Sharik's (Matroskin's) milk, then he will have three times as much milk. This means that Sharik and Matroskin currently have the same amount of milk, and the bucket has twice as much milk as each of them.

This means that the bucket currently has half of all the milk, that is, 5 liters, and Sharik and Matroskin have 2.5 liters each. Therefore, in the end, Matroskin has $2.5+5=7.5$ liters.

## Answer

7.5 liters.