The fourth graders at VES decided to take a survey, and 90 people took part! Of the people vurveyed, 20 said that they preferred chocolate ice cream. 1/3 said they preferred vanilla, and the rest picked choclate and vanilla swirl as their favorite ice cream flavor. How many people like chocolate and vanilla swirl ?

What is the percent of increase for a population that changed from 438,000 to 561,000

If 20% of a number is 35, what is 50% of that number?

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?