While selling the watch, a shopkeeper gives a discount of 5% if he gives a discount of 7 % he earns Rs. 15 less as profit. The marked price of the watch is:

A. Rs. 697.50
B. Rs. 712.50
C. Rs. 787.50
D. None of these

Explanation:

Marked price is Rs. X

(7% of X) – 15 = 5% of X (Or)

7X/100 – 5X/100 = 15 or X = 750