Question

find p(x>2)

x = P(X)
1 =0.30
2 =0.40
3 =0.15
4=?

Answer 1

so when x=4, u want P(X) =... ? right ?
use the property that sum of P(1) through P(4) =1
then u get P(4) easily.

Answer 2

then P(x>2) is just P(3)+P(4)

Answer 3

can you just do it for me.. how do i find p(4)?

Answer 4

can you just do it for me.. how do i find p(4)?

Answer 5

sorry, i can't just do it for you.
i can show you what to do
P(1)+P(2)+P(3)+P(4) = 1
you can find P(4) from that.

Answer 6

so i would do 0.30+0.40+0.15? =0.85..then what do i do

Answer 7

i loks like it might be 0.20

Answer 8

howd you get that though..

Answer 9

I don't understand the question.
We can find P(x>2) using the idea that P(all x) = 1
and P(x>2) = 1 - P(x ≤ 2)

however, unless we know that x can only be 1,2,3,4 we cannot find P(x=4)

Answer 10

P(4) = 1-0.85 = 0.15
P(X>2) = P(3)+ P(4) = 0.15+0.15 = 0.3