問題詳情
10.某班共有 40 人，已知第一次段考數學成績依次成公差為 2 分的等差數列，且沒有同分現象，若最高分為 98 分，則不及格有多少人？
(A) 19 人
(B) 20 人
(C) 21 人
(D) 22 人
(A) 19 人
(B) 20 人
(C) 21 人
(D) 22 人
參考答案
答案：B
難度：計算中-1
書單：沒有書單，新增
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