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October 20, 2014

October 20, 2014

Posted by **Leena** on Tuesday, November 6, 2012 at 3:20pm.

- Math -
**Steve**, Tuesday, November 6, 2012 at 3:36pmif the numbers a,b,c,d,e are sorted in increasing order, then

(a+b+c+d)/4 = 80

(b+c+d+e)/4 = 90

equating the expressions for (b+c+d)/4, we have

80 - a/4 = 90 - e/4

e/4 - a/4 = 10

e-a = 40

the range is thus 40

- Math -
**Anonymous**, Friday, October 10, 2014 at 6:47am320,360

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