Question

3. Cameron has been given 4 boxes with samples

of soil. If all of the samples can either be
classified as mineral-rich, mineral-neutral, or
mineral-poor, how many different ways could
Cameron possibly classify all 4 samples, given
that they could all be classified as the same type
if that were the case?
A. 3
B. 4
C. 12
D. 81

Answer 1

Answer: D. 81

Explanation:

Box A: 3 possibilites

Box B: 3 possibilites

And so on, so you get 3^4, which is 81