Mock AMC 8 #1 - Problem 5

Farmer John manages a farm with a total of 120 chickens. He records data on egg production, presenting it in a graph shown below.

The graph illustrates egg production data for four different chicken breeds. Each breed is represented by a pair of columns: an orange column where the height corresponds to the number of eggs laid by each chicken of that breed, and a blue column where the height represents the total population of chickens belonging to that breed.

Find the average number of eggs laid per chicken.

(\textbf{A})\;86\quad(\textbf{B})\;86.5\quad(\textbf{C})\;87\quad(\textbf{D})\;87.5\quad(\textbf{E})\;88

Enter your answer as a capital letter.