Correct option is D
Given
Registered voters who cast votes = 80%
Invalid votes = 2% of cast votes
Candidate secured = 8820 votes (75% of valid votes)
Formula Used
Solution
Let the total valid votes be V.
Let the total votes cast be C.
Since 2% were invalid, 98% of the cast votes are valid.
Let the total registered voters be R.
Since 80% of registered voters cast their votes:
Final Answer
So the correct answer is (d)