英语写的数学题 急12.The average (arithmetic mean) of three consecuti
英语写的数学题 急 12.The average (arithmetic mean) of three consecutive even integers a,b,and c is 8.What is the median of a,b,c,and 20 (A) 8 (B) 9 (C) 10 (D) 11 (E) 12
The average (arithmetic mean) of three consecutive even integers a, b, and c is 8. What is the median of a, b, c, and 20 ? 三个连续的数abc的平均值是8,三个数的中间数是什么? 后面的and 20不知道是什么意思(还有20)