A vendor purchased 40 dozens bananas for ₹250. Out of these 30 bananas were rotten and could not be sold. At what rate per dozen should he sell the remaining bananas to make a profit of 20%?

 a) ₹ 10
 b) ₹ 8
 c) ₹ 12
 d) ₹ 6

SSC CHSL-2015

Rs 8. Solution Cost price of 480 bananas(40 x 12) = 250 Number of bananas to be sold = 480-30 = 450 Selling price of 450 bananas = cost price + profit = 250 + 20x250/100 = 300 Selling price per dozen = 300 x 12/450 = Rs. 8