某次小测验,21位男同学的平均成绩是82分,位女同学的平均成绩是84分,全体同学的平均成绩是多少分?.i+c0f.n(K;O7T1b4F2|'G;V1B.d2O8`9B.w
算式:提示+{1y3M8t.i+c0f.n(K;O7T1b4F2|'G;V1B.d2O8`9B.w
答:全体同学的平均成绩是82.95分。.i+c0f.n(K;O7T1b4F2|'G;V1B.d2O8`9B.w