【急】英语数学题over 9 games,a baseball team had an average of 8 run
1个回答
一个棒球队在9场比赛里面平均每场打出了8个本垒打.如果前7场比赛平均打出6次本垒打,而剩下的两场比赛打出的本垒打的次数相同,问最后一场比赛打出多少个本垒打?
(8×9-6×7)/2=15
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