South Carolina Code 7-17-610. What constitutes majority vote
(1) If a candidate for a single office is to be selected, and there is more than one person seeking nomination, the majority shall be ascertained by dividing the total vote cast for all candidates by two. Any excess of the sum so ascertained shall be a majority, and the candidate who obtains a majority shall be declared the nominee.
(2) If nominees for two or more offices (constituting a group) are to be selected, and there are more persons seeking nomination than there are offices, the majority shall be ascertained by dividing the total vote cast for all candidates by the number of positions to be filled, and by dividing the result by two. Any excess of the sum so ascertained shall be a majority, and the candidates who obtain a majority shall be declared the nominees in the first primary. If more candidates obtain a majority than there are positions to be filled, those having the highest vote (equal to the number of positions to be filled) shall be declared the nominees.