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NotSoSmart  Sep 21, 2018
 #1
avatar+3189 
+3

First Quartile= Quartile 1, 25, 35, 45, 50, 60, 80, 90, 95, 100- median is 60, 35+45=80/2=40, (A)?

tertre  Sep 22, 2018
 #2
avatar+90023 
+1

Order the data  from  highest to lowest

 

25  35  45   50   60   80  90   95   100

 

The median  is   60

 

The first quartile is the median of the data points  to  the  left   the median

 

So...this median is    [35 + 45] / 2   = 80 / 2   = 40   [ just as tertre found  !!! ] 

 

 

cool cool cool

CPhill  Sep 22, 2018

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