6. In a group of 65 people, 40 like cricket, 10 like both cricket and tennis. How many like tennis? How many like tennis only? (2018)

7. In a survey, it was found that 21 people liked product A, 26 liked product B and 29 liked product C. If 14 liked products A and B, 12 liked products C and A, 14 people liked product B and C and 8 liked all the three products. Find how many liked product C only.