11:05 48 maths.sparx-learning.com The tree diagram shows the probability of a driver having to stop at two sets of traffic lights. If you drove along the road 30 times, what is the expected number of times you will have to stop for at least one of the sets of traffic lights? Watch video Answer
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Step 1: Identify the probabilities from the tree diagram: - Probability of stopping at the first set of lights: \( \frac{2}{3} \) - Probability of not stopping at the first set of lights: \( \frac{1}{3} \) - Probability of stopping at the second set of lights: \( Show more…
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