Question 1120101
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Ed invested a certain amount at 10% simple interest per year after 2 years the interest he received amounted to 3,000.  
how much did he invest?
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It is about a <U>SIMPLE INTEREST</U> !


The other tutor solved another problem for a COMPOUND interest.



<pre>
At simple interest, the interest after 2 years is 


I = 2*0.1*X,


Where X is an unknown principal.


2*0.1*X = 3000  ====>  X = {{{3000/(2*0.1)}}} = 15000.


<U>Answer</U>.  15000 were invested under given conditions.
</pre>