Mrs. Susan 2

Mrs. Susan received a shipment of 60 novelty baseball caps. Of the caps, 1/3 had bug antennae, 2/5 had moose antlers, and the rest had plastic propellers. How many of the caps had plastic propellers?

Final Answer:

c =  16

Step-by-step explanation:

$$\begin{gathered} n=60 \\ a=\frac{1}{3}\cdot n=\frac{1}{3}\cdot 60=\frac{1\cdot 60}{3}=\frac{60}{3}=20 \\ b=\frac{2}{5}\cdot n=\frac{2}{5}\cdot 60=\frac{2\cdot 60}{5}=\frac{120}{5}=24 \\ c=n-a-b=60-20-24=16 \end{gathered}$$

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