Rodrick mixes a martini that has a volume of 'n' ounces having 38% Vermouth and 60% Gin by volume. He wants to change it so that the martini is 25% Vermouth by volume. How many ounces of Gin must he add?	Choose the correct choice from the following
A) n/6 B) n/3 C) 13n/25 D) 5n/6 E) 8n/5
total V G   1 ounce 0.38 0.6   n ounce 0.38n 0.6n -------------initial expression   lets say g ounces of gin is added to this mixture   n+g 0.38n 0.6n+g --------------final expression   given that after adding g ounces of gin , V should become 25% of the total volume.   =&gt;Volume of V/total volume = 25/100   =&gt; 0.38n /n+g = 1/4   =&gt; 1.52n = n+g   =&gt; g = 3n/5   Answer is C.   Note that after we add pure Gin, the volume of Vermouth will remain the same. Based on this set the equation:   0.38n=0.25(n+g) --&gt; g=13n/25   Answer: 13n/25.
<result>C</result>
Rodrick mixes a martini that has a volume of 'n' ounces having 38% Vermouth and 60% Gin by volume. He wants to change it so that the martini is 25% Vermouth by volume. How many ounces of Gin must he add?