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30 July, 05:48

A spinner is separated into 5 equal pieces, as shown below: patrick spins the spinner 9 times. what is the theoretical probability that it stops on the brown sector on the last spin?

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  1. 30 July, 05:53
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    To solve this problem, let us first define what probability means in this case. It would be:

    Probability = (number of colors to choose from) / (total number of colors)

    There are a total of 5 colors on the spinner. The number of colors to choose from spins 1 to 8 would be 5 out of 5, while for the last spin 9 the number of colors to choose from would only be brown so that would be 1 out of 5. The total probability would be the product of the probability of each spins, therefore:

    Probability = 1st spin * 2nd spin * 3rd spin * 4th spin * 5th spin * 6th spin * 7th spin * 8th spin * 9th spin

    Probability = (5/5) * (5/5) * (5/5) * (5/5) * (5/5) * (5/5) * (5/5) * (5/5) * (1/5)

    Probability = 0.2

    There is a 20% chance to get brown on the last spin.
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