Answer:
25 points
To win a game, a team must score 25 points with a two-point difference. If they're too closely matched, the game can continue over the 25-point maximum. On the final deciding game of the match it's only played until 15 points, but the two-point difference still applies
Step-by-step explanation:
Olympic Volleyball Scoring
Sets are played until one team reaches 25 points. If a fifth set is played, it will go until a team reaches 15 points. A team must win by a margin of two points to win the set.