ANSWER :
A. The successes are all the experiments that include at least one head.
EXPLANATION :
The team needs to win all three games for them to advance to the championship.
So the experiment is a success if there are 3 Heads.
From the results of the simulation, there are only 2 successes out of a series of 15 experiments.
Since each coin represents one game, the experiment needs 3 coins.
The only statement that is NOT true is "the successes are all the experiments that include at least one head" because an experiment is a success if there are 3 heads.