Comprehension Passage
Direction: Study the following data carefully and answer the following questions.
The given pie chart represents the number of students present in different classes.
Find the ratio of the number of students in class 6th and 9th together to the number of students in 8th and 10th together.
1
19 : 21
2
22 : 19
3
19 : 18
4
23 : 19