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The following table contains the probability distribution of the number of daily traffic accidents in a small town.
Number of daily accidents
X
0
1
2
3
4
5
P (X = x)
0.10
0.45
0.20
0.15
0.05
0.05
The variance of the number of accidents per day is
Select one:
1.
0.5857
2.
1.8575
3.
3.0625
4.
1.5875
5.
1.2600
Sagot :
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