2. A dealer purchased 250 bulbs for Rs. 10 each. However, 12 bulbs got fused which she had to throw away. She sold the remaining bulbs at Rs. 12 each. Find her gain or loss per cent in the transaction

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Solution

$CP of 1 bulb = Rs 10 CP of 250 bulbs = Rs (10 \times 250) = Rs 2500 Now, 12 bulbs got fused, then Number of bulbs left for selling = 250 - 12 = 238 SP of 1 bulb = Rs 12 SP of 238 bulbs = Rs (238 \times 12) = Rs 2856 Since total SP > total CP, so profit ocurrs . Now, profit = Total SP - total CP = 2856 - 2500 = Rs 356 Now, profit % = [\frac{profit}{CP} \times 100] % = (\frac{356}{2500} \times 100) % = 14.24 %$

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