Fred is playing tennis. For every 2 of his serves that land in, 3 serves land out. If he hit 30 serves in, how many serves landed out?
Select from the choices below
A. 45
B. 90
C. 6
D. 180
For every $2$ serves that land in, $3$ serves land out. So for every $5$ serves, $3$ land out. So for every $5$ serves, $2$ land in.
If $2$ serves land in for every $5$ serves, then $30$ serves land in for $30 \times \dfrac{5}{2} = 75$ serves. So for $75 = 5 \times 15$ serves, $15 \times 3 = 45$ serves land out.
For $30$ serves, twice the number, $2 \times 45 = \boxed{\textbf{(A) } 45}$ serves land out.