Question 1208177
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Mr Thomas spent $1972 on cars and dolls. He bought 3 times as many cars as dolls. 
Each doll cost $10 more than each car. She paid $476 more for the cars than the dolls. 
What is the cost of a doll.
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How Mr. Thomas suddenly became "She" ?



        If it was an "artificial intelligence", who created this problem, 

        hence, this artificial intelligence has a defective logic inside, which should be fixed.


        In order for do not scare people around.



        Another version is that a professor who composed this problem was drunk.



        Third version is that the problem's creator does not read what he/she writes and posts.



        Appropriate problem to submit it for  shNobel prize competition.



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<pre>
From the problem, we know that the total cost was $1972, and the cost for the cars 
was $476 more than for the dolls.


Hence, the cost for the cars  was  {{{1972/2}}} + {{{476/2}}} = 1224 dollars,

   and the cost for the dolls was  {{{1972/2}}} - {{{476/2}}} =  748 dollars.


Let the number of the dolls be x.  
Then the number of cars is 3x.


The price for one doll (each doll) is  {{{748/x}}}.

The price for one car  (each car) is  {{{1224/(3x)}}} = {{{408/x}}}.


From the problem, we have this equation for the price difference

    {{{748/x}}} - {{{408/x}}} = 10  dollars.


Simplify and find x

    {{{(748-408)/x}}} = 10

    {{{340/x}}} = 10

    x = {{{340/10}}} = 34.


Hence, the cost of a doll is {{{748/34}}} = 22 dollars.    <U>ANSWER</U>
</pre>

Solved.


Simply, &nbsp;easy, &nbsp;fresh and funny. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;And educative.