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The bankers gain on a certain sum due 1 \(\frac{1}{2}\) years hence is  \(\frac{3}{25}\) of the bankers discount. The rate percent is:

Options:
A .  \(5\frac{1}{5}\) %
B .  \(9\frac{1}{11}\) %
C .    \(8\frac{1}{8}\)%
D .    \(6\frac{1}{6}\) %
Answer: Option B

Let, B.D = Re. 1.


Then, B.G. = Re.  \(\frac{3}{25}\)


So, T.D. = (B.D. - B.G.) = Re. \(\left(1-\frac{3}{25}\right) = Re. \frac{22}{25}.\)


Sum \(\left(\frac{1\times \left(\frac{22}{25}\right)}{1-\left(\frac{22}{25}\right)}\right) = Rs.\frac{22}{3}\)


S.I. on Rs.  \(\frac{22}{3}\)  for  \(1\frac{1}{2}\)  years is Re.1.


So , Rate =    \(\left(\frac{100\times1}{\frac{22}{3}\times\frac{3}{2}}\right)\)  % =  \(\frac{10c}{11} \)   = \(9\frac{9}{11}\)   %


 


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