People get caffeine from a variety of sources: coffee, tea and caffeine soda. Suppose that among adults, 55% drink coffee, 25% drink tea, and 45% drink soda. Furthermore, 15% drink coffee and tea, 25% drink coffee and soda, 5% drink tea exclusively, and 5% drink all three beverage types.

a) What percent of adults drink only coffee?
b) What percent of adults drink only soda?
c) What percent of adults drink none of the beverage types?

Question

People get caffeine from a variety of sources: coffee, tea and caffeine soda. Suppose that among adults, 55% drink coffee, 25% drink tea, and 45% drink soda. Furthermore, 15% drink coffee and tea, 25% drink coffee and soda, 5% drink tea exclusively, and 5% drink all three beverage types.

a) What percent of adults drink only coffee?
b) What percent of adults drink only soda?
c) What percent of adults drink none of the beverage types?