A retailer offers the following discount schemes for an article to his customers.
A. Two equal successive discounts of 15% .
B. Two successive discounts of 12% and 18%.
C. Buy 7 articles and get 3 free.
Which scheme is favourable to a customer? (assuming buys articles in a multiple of 10)

A

Only A

B

Only C

C

Both A and C are the same

D

Only B