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
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)

Add the probabilities of 2-5.

0.45 To find P(X > 1) (the probability of X being greater than 1), we need to sum up the probabilities of all values of X that are greater than 1.

Looking at the provided data, we see that the values of X that are greater than 1 are 2, 3, 4, and 5. The corresponding probabilities for these values are 0.20, 0.20, 0.15, and 0.10, respectively.

To find P(X > 1), we sum up these probabilities:

P(X > 1) = P(X = 2) + P(X = 3) + P(X = 4) + P(X = 5)
= 0.20 + 0.20 + 0.15 + 0.10
= 0.65

Therefore, the probability of X being greater than 1 is 0.65 or 65%.