Texting:Five teenagers are selected at random. LetX

be the number of them who have sent text messages on their cell phones within the past30

days. According to a recent study, the probability distribution ofX

is as follows:

x

0

1

2

3

4

5

P

x

0.014

0.098

0.258

0.343

0.227

0.060

Send data to Excel

Part 1 of 6

(a) FindP

4

.

=

P

4

0.227

.

Part:1 / 6

1 of 6 Parts Complete

Part 2 of 6

(b) FindP

More than3

.

P

More than=

3

.