Question

The probability distribution of a r.v. X is

X = x	-3	-2	-1	0	1
P(X = x)	0.3	0.2	0.25	0.1	0.15

Then F (-1) = ?

Options

• 0.5

• 0.75

• 0.9

• 12

Answer 1

0.75

Explanation:

F (- 1) = 0.3 + 0.2 + 0.25 = 0.75