单选题
After 5 games, a rugby team had an average of 28 points per game. In order to in crease the average by n points, how many points must be scored in a 6th game?
(A) n (B) 6n (C) 28n
(D) 28+n (E)28+6n
(A) n (B) 6n (C) 28n
(D) 28+n (E)28+6n
【正确答案】
E
【答案解析】[解析] 设第6场比赛的得分为x，根据题意可得：
