Answer:
[tex]P(x \geq 1) = 0.55[/tex]
Step-by-step explanation:
Given:
x --------------3 ---------1 ------- –1
P(X = x) --- 0.25 ---0.30 ---- 0.45
Required
Calculate [tex]P(x \geq 1)[/tex]
[tex]x \geq 1[/tex] implies that x = 1,2,3,4......
So:
[tex]P(x \geq 1) = P(x = 1) + P(x = 3)[/tex]
From the above table
[tex]P(x = 1) = 0.30[/tex]
[tex]P(x = 3) = 0.25[/tex]
Substitute these values in [tex]P(x \geq 1) = P(x = 1) + P(x = 3)[/tex]
[tex]P(x \geq 1) = 0.30 + 0.25[/tex]
[tex]P(x \geq 1) = 0.55[/tex]
