calculate average of 3 9 15 — step-by-step solution

⚠ 3 9 15 is read as 3915, the space being ignored: write 3*9*15 for a product or 3^9^15 for a power

Let's evaluate:

\frac{3 + 9 + 15}{3}

ℹ

3 + 9

12

\frac{12 + 15}{3}

ℹ

12 + 15

27

\frac{27}{3}

▷Answer: $9$