1000 ml of a saline solution contained 52% salt. How much water should be added to make the solution 51% water?

Question

(A) 61.2 ml

(B) 40 ml

(C) 19.6 ml

(D) 10 ml

(E) None of the above

I got (C) 19.6 ml. Is this correct?

Answer 1

So, right now you have 480 ml of water. Is 499.6 ml 51% of 1019.6?

0.51(1019.6) = 499.6

520 = 499.6

Nope.

480 + w = 0.51(1000 + w)

480 + w = 510 + 0.51w

0.49w = 30

w = 61.2

A