JamesB8
Badges: 4
Rep:
?
#1
Report Thread starter 8 months ago
#1
1) The discrete random variable X has probebility function

P(X=x) = {k(x^2 - )
0

x = 4,5,6 otherwise

Where k is a positive constant

A) show that k= 1/50

B) Find the probebility distrubution of X
0
reply
JamesB8
Badges: 4
Rep:
?
#2
Report Thread starter 8 months ago
#2
Help plez
0
reply
gdunne42
Badges: 21
Rep:
?
#3
Report 8 months ago
#3
(Original post by JamesB8)
1) The discrete random variable X has probebility function

P(X=x) = {k(x^2 - )
0

x = 4,5,6 otherwise

Where k is a positive constant

A) show that k= 1/50

B) Find the probebility distrubution of X
Work out P(X=4), (X=5) and (X=6) in terms of k
What is the sum of all possible probabilities?
0
reply
Nerd_101
Badges: 10
Rep:
?
#4
Report 8 months ago
#4
sub the x's into the function, add all of them together, the sum of all probabilities must equal 1. now 50k=1 do a bit of rearranging to get the answer. For part b, put it into table format
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • Bournemouth University
    Midwifery Open Day at Portsmouth Campus Undergraduate
    Wed, 16 Oct '19
  • Teesside University
    All faculties open Undergraduate
    Wed, 16 Oct '19
  • University of the Arts London
    London College of Fashion – Cordwainers Footwear and Bags & Accessories Undergraduate
    Wed, 16 Oct '19

How has the start of this academic year been for you?

Loving it - gonna be a great year (128)
18.21%
It's just nice to be back! (193)
27.45%
Not great so far... (251)
35.7%
I want to drop out! (131)
18.63%

Watched Threads

View All