Question

What does the column "x*P(x)" sum to and why?

Short answer

The sum of column x*P(x) gives$4.42$

Step-by-step solution

Given information

The given information in Q. 30 table is considered for simplifying this problem

x	P(x)
1	0.1
2	0.05
3	0.1
4	0.13
5	0.3
6	0.2
7	0.1

Explanation

The value of xP(x) is calculated as follows:

x	P(x)	x*P(x)
1	0.1	0.1
2	0.05	0.1
3	0.1	0.3
4	0.13	0.52
5	0.3	1.5
6	0.2	1.2
7	0.1	0.7

The sum of column x*P(x) gives $4.42$