11. As shown in the figure, there are 10 cards, each card has a number from $0 \sim 9$, and there are no duplicates. Xiaoyu and Xiaomu each take 5 cards and start playing a card game. The rules of the game are as follows:
(1) Both players calculate the sum of the numbers on all 5 cards they have as their initial score.
(2) In each round, both players play 1 card from their hand. Each player will add the number on the card they played to their current score, and then subtract the number on the card played by the opponent.

After all the cards are played, Xiaomu's score is twice that of Xiaoyu. What is Xiaoyu's initial score?
匹答案】20

Match answer】20