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Find the mean variance and standard deviation for the number of 3s that will be rolled

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Asked: Mar 21,2023 In: Probability
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name i sixsigma Punditsdkoslkdosdkoskdo
Asked: Mar 21,2023 In: Probability

Find the mean variance and standard deviation for the number of 3s that will be rolled

Probability question about rolling a die several times.

5. A die is rolled 240 times. Find the mean, variance and standard deviation for the number of 3s that will be rolled?  


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i sixsigma Added an answer on Mar 21,2023

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For binomial Probability mean = np, variance = np(1-p) and standard deviation = sqrt(variance)

n  =  240  
p = 0.17  
     
Mean  =  40
Variance  =  33.3333
Stand = 5.7735
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