
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
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May 23rd, 2018, 12:57 AM  #11  
Senior Member Joined: Aug 2014 From: India Posts: 295 Thanks: 1  Quote:
But I understood how you got this values: 30000,1.10, 1.20 etc. But I didn't understand how this equation obtained in my solution: 30000 [1+10/100]^2 x [1+20/100]  30000 ?  
May 25th, 2018, 09:22 AM  #12  
Math Team Joined: Jan 2015 From: Alabama Posts: 3,261 Thanks: 894 
I thought that I had explained that. Quote:
+ Quote:
But the question asked for "total interest earned" for those two year. That is the total amount at the end of the second year minus the original amount: $\displaystyle 3000[1+ 10/100]^2(1+ 20/100) 3000$. Last edited by skipjack; May 25th, 2018 at 01:03 PM.  

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