By selling 1 dozen ball pens, a shopkeeper earned the profit equal to the selling price of 4 ball pens. Find his profit percent.
Answer & explanation
Correct answer: option 1
ATQ,
⇒ S.P. - C.P. = Profit
⇒ 12 S.P. - 12 C.P. = 4 S.P.
⇒ 8 S.P. = 12 C.P.
⇒ S.P. : C.P. = 3 : 2
⇒ Profit = 1R
⇒ Profit % = \(\frac{1}{2}\) × 100 = 50%