Comprehension Passage
Direction: Study the graph and answer the following questions.
What is ratio of number of samples tested in Lab D to the total number of samples tested in Lab B and C together?
1
12 ∶ 7
2
10 ∶ 9
3
11 ∶ 10
4
5 ∶ 4
5
12 ∶ 11
Direction: Study the graph and answer the following questions.