The Hair Company Offers Two Brands Of Shampoo, Brand H And Brand S. 100 Pe…

the hair company offers two brands of shampoo, brand h and brand s. 100 people are surveyed and their brand preference are as follow, 50 people liked brand H and 35 people liked brand S.
What is the maximum number of people liked brand H and brand s?
What is the maximum number of people liked both brand H and brand S?
What is the minimum number of people who do not liked any of the brand?​

Answer:

50people like brand H,35 people like brand S,and 15people like both brand.