Each of those little tally marks is one person's answer. They're conveniently counted up for each fruit category for us. The total number of people is thus 5+6+7+4=22.
Cam bought some used books for $4.95. he paid $0.50 each for some books and $0.35 each for the others. he bought fewer than 8 books at each price. how many books did cam buy?