Raskina I.V.

At the exchange office, two types of operations are carried out:

1) give 2 euros - get 3 dollars and a candy as a gift;
2) give 5 dollars - get 3 euros and a candy as a gift.

When the wealthy Pinocchio came to the exchange office, he only had dollars. When he left, he had fewer dollars, no euros appeared, but he received 50 candies. How much did such a "gift" cost Pinocchio in dollars?
Since Buratino received 50 candies, he performed exactly 50 operations. During this time, he exchanged all the euros he received back into dollars. Therefore, for every two operations of the second type, there were three operations of the first type, and on these five operations, Buratino lost $2 \cdot 5 - 3 \cdot 3 = 1$ dollar. Thus, he spent $50 : 5 = 10$ dollars.

## Answer

10 dollars.