4. A pirate schooner has taken a merchant ship by boarding. Ten pirates did not participate in the fight, while the rest lost either a hand, a leg, or both a hand and a leg in the battle. $54\%$ of the participants in the battle lost a hand, and $34\%$ lost both a hand and a leg. It is known that $2/3$ of all the pirates on the schooner lost a leg. How many pirates were on the schooner?
Answer: 60 pirates.

Solution - similar to option v3a.