Mathematics
4.88 M Players
Erin reads an average of 20 books per year. She read 23, 17, 20, and 19 books in four different years. How many books did Erin read in the 5th year to make it an average of exactly 20.0 per year?
There are 5 black cats and 6 white cats. They are all five years old. Each black cat each weighs 12 pounds. Each white cat weighs 15 pounds. How much do they weigh altogether?