Use reasoning to answer the following question.
If 10 % of an electricity bill is deducted, 45 is still to be paid. How much was the bill?\nOptions:\n(A) 50\n(B) 60\n(C) 55\n(D) 70\n(E) None of these

(A)
Let the bill be x.

Then\n90% of x = 45\n⇒ x = 45×100/90 = 50.

The answer: (A)