If 25% of x is 15 less than 15% of 1500, then x is?

A. 720
B. 750
C. 820
D. 840
E. None of these

Explanation:

25% of x = x/4 ; 15% of 1500 = 15/100 * 1500 = 225

Given that, x/4 = 225 – 15 => x/4 = 210 => x = 840.