Question

The following data were obtained from a survey of college students. The variable X represents the number of non-assigned books read during the past six months.
x
x
0
1
2
3
4
5
P (X=x)
0.20
0.25
0.20
0.15
0.10
0.10

Find P( X > 1)
A.0.20
B.0.80
C.0.55
D.0.45

Answer 1

If the variable X represents the number of non-assigned books read during the past six months, then:
P( X > 1) = P(2) + P(3) + P(4) + P(5) = 0.2 + 0.15 + 0.1 + 0.1 = 0.55
So, the right answer is:
C.0.55