A-A+
Monthly rainfall was recorded for two towns ov
问题详情
Monthly rainfall was recorded for two towns over a five-month period using the chart above. If the median rainfall in Noah"s Landing was equal to the average (arithmetic mean) rainfall in Bellaville, what is the value of x？
A．1
B．8/5
C．2
D．3
E．10请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：D
解析：Noah'sLandinghadamedianrainfallof2inches,becauseifweputthenumbersinanorderedlist(0,1,2,2,3),themiddlenumberis2.ThatmeansBellavillehadameanof2inches.Sincethemeanisjustthetotalofthenumbersdividedbythenumberofnumbers,andtherearefivenumbersinthelist,thetotalofthatlistmustbe10.Whenwesubtracttheexistingvaluesfrom10,weget10-2-0-4-1=3.
