Answer:
4200
Explanation:
Attach is the missing graph in the question.
Given: Total number of people voted= 12000 people
Now finding the total number of voters in the age group of 50-64.
As given in the graph, Age group of 50-64 has 35% voter.
Number of voter=

⇒ Number of voter in the age group of 50-64 =

∴ Total number of voter in age group of 50-64 is 4200.