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# the R students in a class agree to contribute equally to buy

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26 Aug 2006, 16:31
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the R students in a class agree to contribute equally to buy their teacher a birthday present that costs y dollars. if x of the students later fail to contribute their share, which of the following represents the additional number of dollars that each of the remaining studnets must contribute in order to pay for the present?

A. y/R
B. y/ (R-x)
C. xy/(R-x)
D. xy/R(R-x)
E. y/R(R-x)
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26 Aug 2006, 17:06
If R stu so every stu must contributes y/R
Because x are off so every stu must contributes y/(R-x)
The difference is xy/(R*(R-x))
D it is
26 Aug 2006, 17:06
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# the R students in a class agree to contribute equally to buy

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