Carlson was given a bag of candies: chocolate and caramels. In the first 10 minutes, Carlson ate 20% of all the candies, and 25% of them were caramels. After that, Carlson ate three more chocolate candies, and the proportion of caramels among the candies Carlson had eaten decreased to 20%. How many candies were in the bag Carlson was given?
In the first portion of candies eaten, there were 3 times more chocolate ones than caramels, and then their number became 4 times more. This means that the number of additional chocolate candies eaten equals the number of caramels. Thus, at the beginning, Karlson ate 3 caramels and 9 chocolate candies, and these 12 candies make up $20 \%$ of all the candies. Therefore, there were 60 candies in the bag in total.

## Answer

60 candies.