105.126 * 35.201 – 90.23 * 3 + 55.11 * 27.01 = ____________?

A. Rs. 21,000
B. Rs. 22,500
C. Rs. 25,300
D. Rs. 25,800

A. Rs. 20
B. Rs. 15
C. Rs. 22.50
D. Rs. 7.50
E. None of these
Explanation:
CP of 20 dozen of bananas = 15 * 20 = Rs. 300
Number of bananas which are rotten = 1/4 * 20 = 5 dozen.
SP of two-third of remaining bananas = (2/3 * 15) * 22.5 = Rs. 225
SP of remaining 5 dozens of bananas to make no profit and no loss =(300 – 225) = Rs. 75.
SP of 1 dozen bananas = 75/5 = Rs. 15.