Question 627092
Mean:


mu = np


mu = 500*0.01


mu = 5


So the mean is 5


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Variance:


sigma^2 = np*(1-p)


sigma^2 = 500*0.01*(1-0.01)


sigma^2 = 4.95


So the variance is 4.95

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Standard Deviation:


sigma = sqrt(np*(1-p))


sigma = sqrt(500*0.01*(1-0.01))


sigma = 2.2248595


So the variance is roughly 2.2248595


Note: the standard deviation is the square root of the variance.