Uompoun Meresi. nat Principal will ...
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Uompoun Meresi. nat Principal will amount to 9768 in two years, the rates of interest for the successive years are 10% p.a. and 11% p.a. respectively.

11th - 12th Class
Maths
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31
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Let the Principal was ( P ) for first year, ( R=10 % ) Interest ( =mathrm{PTR} / 10 mathrm{O}=mathrm{P} times 1 times 10 / 100=0.1 mathrm{P} ) Amount at the end of 1 st year ( =P+0.1 P=1.1 mathrm{P} ) For 2 nd year, Principal = 1.1P ( R=12 % ) Interest ( =mathrm{PTR} / 100=1.1 mathrm{P} times 1 times 12 / 100=0.132 mathrm{P} ) Amount at the end of 2 nd year ( =1.1 P+0.132 P=1.232 P ) It is given that amount is 9856 ( Rightarrow 1.232 P=9856 ) ( Rightarrow P=9856 / 1.232 ) ( Rightarrow P=R s .8000 ) Principal was Rs. 8000
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