Question 139730
Occurrences 
0 
1 
2 

Probability
0.60
0.30
0.10 

#1 Compute the mean number of the incidents
#2 Compute the variance for this distribution 
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I don't have Megastat but do have a TI calculator
I enter the 0,1,2 in one list
I enter the 0.6, 0.3, 0.1 in a parallel list
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I choose the command 1-Var Stat L1,L2 and I get:
mean = 0.5
variance = 0.67082..^2 = 0.449999..
Cheers,
Stan H.