Subject: mathqa
Question: in an election between two candidates a and b , the number of valid votes received by a exceeds those received by b by 15 % of the total number of votes polled . if 20 % of the votes polled were invalid and a total of 4720 votes were polled , then how many valid votes did b get ?
Option: 
A: 2991
B: 2834
C: 2999
D: 1534
Answer: D