Question

The average weight of three dogs is 55 pounds, and the average weight of five cats is 9 pounds. What is the average weight, in pounds, of all eight animals?

(A) 8
(B) 12.5
(C) 21.75
(D) 26.25
(E) 46

Answer 1

D 26.25

Explanation:

55× 3 + 9×5 = 210

210 ÷ 8 = 26.25

Answer 2

Option D is correct

Explanation:

Statement 1

Average weight of 3 dogs = 55 pounds

Total weight of 3 dogs = 55 × 3

Total weight of 3 dogs = 165 pound

Statement 2

Average weight of 5 cats = 9 pounds

Total weight of 5 cats = 9 × 5

Total weight of 5 cats = 45 pounds

New Average = 165 + 45/8

New Average = 210/8

New Average = 26.25 pounds