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【OG20-P150-30题】
If the average (arithmetic mean) of the four numbers 3, 15, 32, and (N + 1) is 18, then N =
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题目:假设3、15、32和(N+1)这四个数的平均值为18,求N是多少。
解答:(3+15+32+N+1)/4=18,通过计算得到N=21
题目讨论 (1条评论)

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Eunice要杀鸡大捷!!
算完忘了减1!!!!好坑啊啊!!!!
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0 回复 2021-04-22 16:28:22