In an election between two candidates, one got 55% of the total valid votes. If 20% of the votes were invalid and the total number of votes was 9,000, what was the number of valid votes the other candidate got?

Correct option is C

Given:
Total number of votes = 9000
Percentage of invalid votes = 20%
Valid votes secured by first candidate = 55%
Solution:
Calculate the percentage of valid votes:
100 - 20 = 80
Calculate the total number of valid votes from the total votes:
$$\frac{80}{100}$$​ × 9000 = 7200
The first candidate got 55 percent of the valid votes. Therefore, the second candidate got:
100 - 55 = 45
Calculate the number of valid votes the second candidate got:
$$\frac{45}{100}$$​ × 7200 = 3240
Final Answer
So the correct answer is (c)