The graph and the table below show the units sold by two salesmen, Mr. P and Mr. Q, in 4 months from January to April. Study the graph and the table and answer the question.
What is the respective ratio of the total units sold by Mr. P and Mr. Q during the 4 months?
1
25 ∶ 27
2
23 ∶ 21
3
25 ∶ 23
4
24 ∶ 23