Question

some pens are bought at the rate of 9 for rupees 80 if the whole lot is sold at rupees 10 per percent the gain or loss percent on the whole transaction​

Answer 1

Step-by-step explanation:

9 pens for ₹80

1pen = 80/9 = 8.8

CP=80 SP=88

so, gain = SP - CP

88-80=8

Gain % = gain/ CP ×100

8/80×100

gain % = 10%

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