<p>A mixture M contains 45% red dye by volume. Which of the following represents the percentage of red dye by volume in p pints of mixture M mixed with Q pints of water?</p>
<p>a) (45p/p+q)% b) (45/p+q)%
c) (p+q/45)% d) (45p/q)%
e) 45(p+q)&</p>
<p>/=divided by</p>
<p>Answer: a)</p>
<p>Percent of red dye in mixture = volume of dye / total vol of mixture * 100</p>
<p>volume of red dye = p * 45/100</p>
<p>total volume = p + q</p>
<p>so Percent of red dye = p * 45/100 / (p+q) * 100</p>
<pre><code> = 45 p / (p+q) percent
</code></pre>