Difference between revisions of "1993 AHSME Problems/Problem 9"

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== Solution ==
 
== Solution ==
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If country <math>A</math> has <math>\frac{d}{100}</math> of the wealth in the world and <math>c</math> people that means that each person has
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<math>\frac{d}{100c}</math> of all the wealth in the world. Using a similar argument for Country <math>B</math> we have that each person has <math>\frac{f}{100e}</math> of the wealth In the world. Evaluating the desired fraction gives us <math>\frac{de}{cf}</math>
 
<math>\fbox{D}</math>
 
<math>\fbox{D}</math>
  

Revision as of 16:42, 8 August 2016

Problem

Country $A$ has $c\%$ of the world's population and $d\%$ of the worlds wealth. Country $B$ has $e\%$ of the world's population and $f\%$ of its wealth. Assume that the citizens of $A$ share the wealth of $A$ equally,and assume that those of $B$ share the wealth of $B$ equally. Find the ratio of the wealth of a citizen of $A$ to the wealth of a citizen of $B$.

$\text{(A) } \frac{cd}{ef}\quad \text{(B) } \frac{ce}{ef}\quad \text{(C) } \frac{cf}{de}\quad \text{(D) } \frac{de}{cf}\quad \text{(E) } \frac{df}{ce}$

Solution

If country $A$ has $\frac{d}{100}$ of the wealth in the world and $c$ people that means that each person has $\frac{d}{100c}$ of all the wealth in the world. Using a similar argument for Country $B$ we have that each person has $\frac{f}{100e}$ of the wealth In the world. Evaluating the desired fraction gives us $\frac{de}{cf}$ $\fbox{D}$

See also

1993 AHSME (ProblemsAnswer KeyResources)
Preceded by
Problem 8
Followed by
Problem 10
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All AHSME Problems and Solutions

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