A shopkeeper blends two varieties of tea costing Rs 18 and Rs 13 per 100 gms in the ratio 7:3. He sells the blended variety at the rate of Rs 18.15 per 100 gm. His percentage gain in the transaction is:

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12%

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15%

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10%

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Solution

The correct option is D 10%
$C P = 18 \times \frac{7}{10} + 13 \times \frac{3}{10}$
$= \frac{126 + 39}{10}$
$= \frac{165}{10}$
$=$ Rs 16.5
$S P = R s 18.15$
Gain $=$ Rs 1.65
% gain $= \frac{1.65}{1.65} \times 100 = 10$ %

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A shopkeeper blends two varieties of tea costing Rs 18 and Rs 13 per 100 gms in the ratio 7:3. He sells the blended variety at the rate of Rs 18.15 per 100 gm. His percentage gain in the transaction is:

The correct option is D 10%CP=18×710+13×310=126+3910=16510= Rs 16.5SP=Rs18.15Gain =Rs 1.65% gain=1.651.65×100=10%

The correct option is D 10%
$C P = 18 \times \frac{7}{10} + 13 \times \frac{3}{10}$
$= \frac{126 + 39}{10}$
$= \frac{165}{10}$
$=$ Rs 16.5
$S P = R s 18.15$
Gain $=$ Rs 1.65
% gain $= \frac{1.65}{1.65} \times 100 = 10$ %