Answer:
Geometric mean = 6.71
Arithmetic mean = 9
Step-by-step explanation:
[tex]geometric \: mean \\ = \sqrt{3 \times 15} \\ = \sqrt{45} \\ = 6.70820393 \\ = 6.71 \\ \\ arithmetic \: mean \\ \\ = \frac{3 + 15}{2} \\ \\ = \frac{18}{2} \\ \\ = 9[/tex]