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13 Nov 2007, 08:18
Kudos
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Q. The greatest value of a set is 56,400. the range of this set is 16400. If the greatest value increases 10 %, and the smallest value decreases 10%, by what percent the range of the changed set is increased from the range of the original set?
OA: 59%
A good solution please..
OA: 59%
A good solution please..
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13 Nov 2007, 08:24
Kudos
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The range is 16400. Therefore the minimum value is 56400-16400=40000
The maximum value increases by 10% i.e. 56400+5640=62040
The minimum value decreases by 10% i.e. 40000-4000=36000
The new range = 62040-36000=26040
Percentage change in range = (26040-16400)/16400 = 59%
One can solve this without actually finding the minimum value as well but this just seems faster.
The maximum value increases by 10% i.e. 56400+5640=62040
The minimum value decreases by 10% i.e. 40000-4000=36000
The new range = 62040-36000=26040
Percentage change in range = (26040-16400)/16400 = 59%
One can solve this without actually finding the minimum value as well but this just seems faster.
13 Nov 2007, 08:29
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pretttyune
greatest value 56 400
range 16400
smallest value=56400-16400=40 000
change by 10%
greates value 56400*1.1=62 040
range 62040-36000=26 040
smallest value 40 000*.9=36 000
%% change in range (26 040-16400)/16400=~0.59
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
