Question

find the percentage profit

Answer 1

LCM of 3 & 4 = 12

No. of pens of 1st type = 12

& of 2nd type = 24

cost of 3 pens = Rs. 10

so, cost of 12 such pens = Rs. 40

cost of 4 pens = Rs. 13

so, cost of 24 such pens = Rs. 78

Total C.P. of 36 pens ( 3 dozen ) = 40 + 78 = Rs. 118

S.P. of 1 dozen = Rs 59

so, S.P, of 3 dozen = 59 x 3 = Rs. 177

Profit = 177 - 118 = Rs. 59

% profit = 59/118 x 100 = 50%