To compute the probability of having a fair coin turn up heads four times on four tosses, the theory of probability that would normally be used is the:
A) Conditional theory.
B) Classical (a priori) theory.
C) Subjectivist theory.
D) Relative frequency theory.
E) Relativist theory.

Question

Quizplus · Accepted Answer

The classical (a priori) theory of probability assumes that all outcomes are equally likely, and therefore can be calculated by counting the number of favorable outcomes over the total number of possible outcomes. In this case, there is only one favorable outcome (all four tosses are heads) out of a total of 2^4 possible outcomes (being either heads or tails on each toss). Therefore, the probability is 1/16 or 0.0625.

To Compute the Probability of Having a Fair Coin Turn