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22 March, 22:19

On average, there are 8 customers arrives a local bank per hour. Bob is the only bank teller on duty at the bank currently and needs to run out for 6 minutes. What is the probability that no customer will arrive in the next 6 minutes

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  1. 23 March, 01:23
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    The probability that no customer will arrive in the next 6 minutes is 1.2 minutes or ratio of 0.2

    Explanation:

    Expected value is the value on the probability of occurrence of the values.

    Expected Time consumed on customer in an hour = 8 x 6 = 48 minutes

    Probability of customer arrives = 48/60 = 0.8

    Probability that customer will not arrive = 1 - 0.8 = 0.2

    Expected time Customer will not come in 6 minutes = 6 x 0.2 = 1.2 minutes
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