SAT Math Multiple Choice Practice Question 467: Answer and Explanation
The chart above shows the number of red and blue parrots Toby sold in May and the average weight of each type of bird sold. If Toby sold no other parrots, what was the average (arithmetic mean) weight, in pounds, of the parrots that Toby sold in May?
Correct Answer: B
B Use average pies:
In the first pie you have the number of red parrots sold, which is 5, and the average weight, which is 2. That gives you a total weight of 10 pounds. In the second pie you have the number of blue parrots, which is 4, and the average weight, which is 3. That gives you a total weight of 12. To find the average weight of all the parrots, you need to find the total weight of all the parrots. This is simply the total of the red plus the total of the blue. In the last pie you have the total number of parrots, which is 9, and the total weight of all the parrots, which is 22. This gives you an average weight of .