6 buys drinks and says "I'm 1/2 Israeli and 1/2 Chinese."
15 orders appetizers for everyone and says "I'm 1/2 American and 1/2 Chinese."
12 orders the main course for everyone and says "I'm 2/3 Israeli and 1/3 Chinese."
6 buys drinks and says "I'm 1/2 Israeli and 1/2 Chinese." 15 orders appetizers for everyone and says "I'm 1/2 american and 1/2 Chinese." 12 orders the main course for everyone and says "I'm 2/3 Israeli and 1/3 Chinese." What parts Israeli, Chinese, and American is 10?