Comprehension Passage
Directions: Read the following information carefully and answer the questions based on it.
Below Line graph shows the data of different types of pens used by four persons Ankur, Anshu. Ankit and Harsit in a month.
Calculate the ratio of number of blue and red pens together to the number of black pens used by all four persons together.
1
13 : 7
2
13 : 11
3
13: 5
4
13 : 4
5
13 ; 6