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by 2008 » Sun Aug 17, 2008 2:46 pm
i would say...

10% of 6000 is 600

now if you sum the 3 quarters you got 400, to arrive at 600 you still need 200.

200 is what percent of 6000+400 (as it is compound you reinvest the 400 already earned)...

200 is 3.1% of 6400....

i dont know if it's right, but it sounds nice, doesnt it?
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by sudhir3127 » Sun Aug 17, 2008 10:42 pm
i go with E.. do let me know if its right so that i can post my solution..
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by nervesofsteel » Sun Aug 17, 2008 11:27 pm
E for me too...

we have to earn 200 in last qtr..
the invested amount is 6400.. at R % for last qtr..

200 = 6400 *R/100

R = 100/32 for last qtr..
Now Rate of interest for complete year is 100*4/32

= 12.5%..

Whts the OA..??
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by II » Mon Aug 18, 2008 12:10 am
E is the OA ...

Interested in seeing other approaches to this.
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by sudhir3127 » Mon Aug 18, 2008 12:18 am
My approach was almost the same..here it goes..

6600 = 6400 ( 1+r/100)

solve for r .. r= 3.125 this is for one quarter

for the whole year its would be 3.125*4 = 12.5 hence E.
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