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On her previous five attempts Sarah had achieved times, in seconds, of 86, 94, 97, 88 and 96, for swimming 50 meters. After her sixth try she brought her median time down to 92 seconds. What was her time, in seconds, for her sixth attempt?

SmartMathMan  Dec 7, 2017
edited by Guest  Dec 7, 2017

Best Answer 

 #1
avatar+8 
+2

Times: 86, 88, 94, 96, 97

 

94 is the median

 

92*2=184

 

184-94=90

 

90 is her sixth time.

PearlescentMoon  Dec 8, 2017
 #1
avatar+8 
+2
Best Answer

Times: 86, 88, 94, 96, 97

 

94 is the median

 

92*2=184

 

184-94=90

 

90 is her sixth time.

PearlescentMoon  Dec 8, 2017
 #2
avatar+86944 
+2

 

In order we have

 

86 , 88, X, 94, 96, 97

 

The median  would be    [ 94 + X ]  / 2  = 92   where X is the 6th attempt

 

94 + X  =  184      subtract 94 from both sides

 

90  = 6th attempt time

 

 

cool cool cool

CPhill  Dec 8, 2017

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