Correct option is B
Given
Votes for Candidate A = 45%
Votes for Candidate B = 30%
Invalid votes = 15000
Formula Used
Total percentage of votes = 100%
Invalid votes percentage = 100% -
Solution
Calculate the total percentage of valid votes received by both candidates:
45% + 30% = 75%
100% - 75% = 25%
This means 25% of the total votes equals 15000.
Let the total number of votes be x.
Final Answer
So the correct answer is (b)