# Task № 7.3

## Condition:

Potions teacher Severus Snape has prepared three potions, each with a volume of 400 ml. The first potion makes the person who drinks it smart, the second makes them beautiful, and the third makes them strong. To ensure the potion works, one needs to drink at least 30 ml of it. Severus Snape was about to drink his potions when he was called to the headmaster's office and left, leaving the labeled potions in large jugs on his desk. Taking advantage of his absence, Harry, Hermione, and Ron approached the table with the potions and began to sample them.

Hermione was the first to try the potions: she approached the first jug with the potion of wisdom and drank half of it, then poured the remainder into the second jug with the potion of beauty, thoroughly mixed the contents, and drank half of it. Next, it was Harry's turn: he drank half of the third jug with the potion of strength, then poured the remainder into the second jug, thoroughly mixed everything in this jug, and drank half of it. Now all the contents were in the second jug, which fell to Ron. What percentage of the contents of this jug does he need to drink to ensure that each of the three potions will definitely affect him?
Answer: 60

Exact match of the answer -1 point

Solution by analogy with task №7.1

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