Question

The number of persons X, in a Singapore family chosen at random has the following probability distribution:
X
1
2
3
4
5
6
7
8

P(X)
0.34
0.44
0.11
0.06
0.02
0.01
0.01
0.01

Find the average family size E(X).​

Answer 1

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what class question is it?!