Answer:
In 517 ways
Step-by-step explanation:
There are total 6 people in ballot and voters can vote for any 4 we have following choices
Voter may not vote for anyone then
Since,
and 
Here, n=6 and r=0 we will get

Voter may not vote for one of them then 

Voter may not vote for two of them then 

Voter may not vote for three of them then 

Voter may not vote for four of them then 

Total ways in which a person can vote is
+
+
+
+ 
Substituting the values we will get
[tex]1+6+30+120+360=517[/text] ways.