To determine the probability of getting exactly 1 heads when flipping a coin 3 times, we start by recognizing that each flip has two possible outcomes: heads (H) or tails (T).
First, we calculate the total number of outcomes when flipping a coin 3 times. Since there are 2 outcomes for each flip, the total number of outcomes is:
23 = 8
The possible outcomes are: HHH, HHT, HTH, HTT, THH, THT, TTH, TTT.
Next, we need to determine how many of these outcomes result in exactly 1 heads. The successful outcomes yielding 1 heads are:
- HTT
- THT
- TTT
Thus, there are 3 outcomes that meet our criteria. Now, we can find the probability:
Probability = (Number of Successful Outcomes) / (Total Number of Outcomes) = 3 / 8
Therefore, the probability of flipping a coin 3 times and getting exactly 1 heads is:
3/8