Percentage - General Aptitude

Q1:

In an election between two candidates, one got 55% of the total valid votes, 20% of the votes were invalid. If the total number of votes was 7500, the number of valid votes that the other candidate got, was:

A 2700

B 2900

C 3000

D 3100

ANS:A - 2700

Number of valid votes = 80% of 7500 = 6000.  Valid votes polled by other candidate = 45% of 6000

= 45 x 6000 = 2700.
100