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Question 1 · 4 marks
Calculator allowed
X
X
X
takes values
0
,
1
,
2
,
3
0,1,2,3
0
,
1
,
2
,
3
with probabilities
0.2
,
0.3
,
0.1
,
0.4
0.2,0.3,0.1,0.4
0.2
,
0.3
,
0.1
,
0.4
,
respectively.
(a)
Find
E
(
X
)
E(X)
E
(
X
)
.
2 marks