Toss three coins in the air. Make a list of all possible outcomes and find the probability that:

1. All three coins land “heads” up.

   Answer (a):

   $\frac{1}{8}$

2. Two of the coins land “tails” up.

   Answer (b):

   $\frac{3}{8}\text{ or }\frac{1}{2} \text{ assuming TTT counts.}$