Question

If Cp of 6 pencils is equal to sp of 5 pencils then find gain %

Answer 1

6CP=5SP

CP/SP=5/6

AND

$6 \\ \frac{sp}{cp} = \frac{100 + r}{100} \\ \frac{6}{5} = \frac{100 + r}{100} \\ 600 = 500 + 5r \\ 100 = 5r \\ r = 20\%$

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