3 numbers, 10, y, z, ask what is the median of these 3 numbers? 1). someting trnaslates into y + z = 20 (y-13 = 7 - z or something like this). 2). y = 5
Answer should be C
求中数则答案是C, 注意如果求平均数,则答案是A
我算出來求中数的話答案是A耶.....
條件(1)說y+z=20, 如果y=z=10, then median=10
如果y<=>z (y不等於z), y 和 z 一個會大於10, 一個會小於10, then median=10