1.Below shows a discrete probability distribution:[10]

x

1

2

3

4

5

P(x)

0.2

0.3

m

0.1

0.1

Find:

(a)The value of m

(b)(3P(x) < 5)

(c)(P(x)2)

(d)What is the expected value of x?

(e)What is the standard deviation of this distribution?