Final answer:
The total sample space of an experiment with 3 stages and 4 equally likely sample outcomes per stage is 64.
Step-by-step explanation:
To find the total sample space of an experiment with 3 stages, you need to multiply the number of outcomes of each stage. In this case, each stage has 4 equally likely sample outcomes. So, the total sample space is 4 x 4 x 4 = 64 outcomes.