Rodrick mixes a martini that has a volume of 'n' ounces having 36% 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 one:
A) n/6	B) n/3	C) 4n/9	D) 5n/6	E) 8n/5
total V G   1 ounce 0.36 0.6   n ounce 0.36n 0.6n -------------initial expression   lets say g ounces of gin is added to this mixture   n+g 0.36n 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; 0.36n /n+g = 1/4   =&gt; 1.44n = n+g   =&gt; g = 4n/9   Answer is C.   Note that after we add pure Gin, the volume of Vermouth will remain the same. Based on this set the equation:   0.36n=0.25(n+g) --&gt; g=4n/9   Answer: 4n/9.
<result>C</result>
Rodrick mixes a martini that has a volume of 'n' ounces having 36% 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?