SOLUTION: here is another question i asked before thanks for the all the help
find the 
mean
standard deviation
variance
for 
x   p(x)
0   0.47
1   0.40
2   0.13
Algebra.Com
Question 393801:  here is another question i asked before thanks for the all the help
find the 
mean
standard deviation
variance
for 
x   p(x)
0   0.47
1   0.40
2   0.13 
Answer by robertb(5830)   (Show Source): You can put this solution on YOUR website!
 mean: 
variance: 
==> standard deviation = , to 3 decimal places.
I hope you finally get it... 
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