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24.有21位遊客參加溪頭之旅,他們年齡的次數分配表如下。已知這群遊客年齡的中位數是33歲,則何者正確? (A) a=6 (B) a=7 (C) b=6 (D) b=5
問題詳情
24.有21位遊客參加溪頭之旅,他們年齡的次數分配表如下。已知這群遊客年齡的中位數是33歲,則何者正確?
(A) a=6
(B) a=7
(C) b=6
(D) b=5
參考答案
答案:B
難度:
計算中
-1
書單:
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用户評論
【
Olivia
】評論
21中位數是113+a=10.....觀★★★★★,...
上一篇 :
23.二次函數y=21x2-36x+3的圖形與下列哪一個方程式的圖形沒有交點? (A)x=500 (B)x=-500(C)y=500 (D)y=-500
下一篇 :
25.附圖為二次函數y=( x+1 )2+5的圖形,若在第一象限有一點P( a , b )在此二次函數上,且與原點及Q(6 ,0) 所圍成的△OPQ面積為S,若S=162,則a+b=? (A)60
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