Question #50340

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

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

Expert's answer

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

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

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