Question

The cost price of 20 pens is equal to the selling price of 15 pens .The gain percent is​

Answer 1

Answer:

Let the cost price of 1 pen be 1 ruppees

CP of 20 pens=1×20=20ruppees

SP of 15 pens= CP of 20 pens

SP of 15 pens= 20ruppees

CP of 15 pens= 1×15=15ruppees

Step-by-step explanation:

$\: \: \: so \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\gain\% = \frac{profit}{cp} \times 100 \\ = \frac{20 - 15}{15} \times 100 \\ = \frac{5}{15} \times 100 \\ = 33.33\%$