In an election between A and B, A gets double the votes of B and wins with a margin of 150 votes. 10% of votes were invalid. What is the total number of votes polled in the election?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 500.
Let total votes = x
10% invalid → valid = 0.9x
A = 2B → A + B = 0.9x → 3B = 0.9x → B = 0.3x
Margin = A - B = B = 0.3x = 150 → x = 500