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An experiment involves flipping a coin three times.
The following tree diagram shows the possible outcomes for the experiment.
What is the probability of getting exactly 2 tails?
Enter your answer as a reduced fraction, like this: 3/14
Flipping a coin to get H or T is a 50% (0.5) chance respectively So to get 2 tails we could have gotten: H T T T T H T H T — P( H T T) = 0.5 x 0.5 x 0.5 = 0.125 — P(T T H) = 0.5 x 0.5 x 0.5 = 0.125 — P(T H T) = 0.5 x 0.5 x 0.5 = 0.125 0.125 + 0.125 + 0.125 = 0.375 = 3/8
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