Directions: The bar graph shows the results of an annual examination in a secondary school in a certain year. Answer the following four questions based on this chart.

Q:

The ratio of the total number of boys passed to the total number of girls passed in the three classes VII, VIII and IX is 

• 1
  19 : 25
• 2
  21 : 26
• 3
  20 : 23
• 4
  18 : 21