PSAT/SAT math? /:

<p>15)
A bottle containing "c" ounces of juice can be emptied to fill "g" identical glasses. How many such bottles would be needed to fill "n" of these glasses with juice?</p>

<p>A) gn/c
B) cn/g
C) g/n
D) n/g
E) c/n</p>

<p>The answer is D. But I don't get it.
Can anyone explain it? :)
Thanks!</p>

<p>For these types of questions, re-make them. </p>

<p>“A bottle containing “5” ounces of juice can be emptied to fill “10” indentical glasses. How many such bottles would be needed to fill “20” of these glasses with juice?”</p>

<p>A) 10(20)/5 = 200/5 = 40</p>

<p>B) 5(20)/10 = 100/10 = 10</p>

<p>C) 10/20 = 1/2</p>

<p>D) 20/10 = 2</p>

<p>E) 5/20 = 1/5</p>

<p>You would need 2 bottles to fill 1 glass of juice. </p>

<p>n(5) * 2 = 10 (g)</p>

<p>So only D makes sense. </p>

<p>Substitution makes these questions seem much less intimidating.</p>

<p>OH.
Thanks. :D</p>