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In a class of 50 students, 30 students like to play cricket, 25 like to play football, and 32 like to play hockey. Each student likes to play at least one of the three games. If 15 students like to play both cricket and football, eleven like to play both football and hockey, and 18 like to play both cricket and hockey then please tell me:
1. How many students play all the three games?
2. How many students play only football?
3. How many students play only hockey?
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