SOLUTION: Q1. A coin has 30% chance to land on head if it is freely tossed. Let X be the number of heads on which it lands in 10 tosses. Find the mean and standard deviation of X.
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Question 729446: Q1. A coin has 30% chance to land on head if it is freely tossed. Let X be the number of heads on which it lands in 10 tosses. Find the mean and standard deviation of X.
I just returned from a deployment and I can't for the life of me remember how to do problems like these.
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Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A coin has 30% chance to land on head if it is freely tossed. Let X be the number of heads on which it lands in 10 tosses. Find the mean and standard deviation of X.
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Binomial Problem with n = 10 and p(heads) = 0.6
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mean = n*p = 10*0.6 = 6
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std = sqrt(npq) = sqrt(6*0.4) = sqrt(2.4) = 1.5491
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