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7 kg of tea costing Rs. 280 per kg is mixed with 9 kg of tea costing Rs. 240 per kg. The average price per kg of the mixed tea is ?

7 kg of tea costing Rs. 280 per kg is mixed with 9 kg of tea costing Rs. 240 per kg. The average price per kg of the mixed tea is ? Correct Answer Rs. 257.50

According to the question,
Average price of mixed tea
$$\eqalign{ & {\text{ = }}\frac{{280 \times 7 + 240 \times 9}}{{16}} \cr & {\text{ = }}\frac{{1960 + 2160}}{{16}} \cr & {\text{ = }}\frac{{4120}}{{16}} \cr & {\text{ = Rs}}{\text{. 257}}{\text{.50}} \cr} $$

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