This math skill teaches how to calculate the probability of spinning the same number twice consecutively on a spinner. It explains that these are independent events and uses multiplication to find the intersection of the two probabilities.
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Probability of spinning a number twice in a row
Test your understanding of probability of both spins by practicing it! Work through the below exercises to use it in practice.
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What is the chance of spinning a 5 twice in a row?
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These are independent events since the spinner doesn't change, and we need both to happen, so the probability of both is the intersection of the probability of 5, and the probability of 5 again.
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For intersections, we multiply the probabilities, so we have the probability of 5, times itself.
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Since there is a single 5, and 6 outcomes, the chance of spinning a 5 is 1 in 6.
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So our answer is 1 in 36 as the chance of spinning 5 twice in a row.
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1 in 36 is zero point zero two seven seven, or about a 2.8 percent chance.