Find the Probability of Joint PDF X and Y with Easy Calculation

  • Thread starter Thread starter sjaguar13
  • Start date Start date
  • Tags Tags
    Joint Pdf
sjaguar13
Messages
49
Reaction score
0
Given this joint PDF of X and Y:
Code: 
X\Y	1	2
0 	0.1	0.3
1	0.05	0.1
2	0.2	0.25

So:
P(X = 1| X+Y=2) = 1/2?
P(X <= 1 and Y <= 2) = 1/3?
 
Physics news on Phys.org
...Anyone?
 
sjaguar13 said:
Given this joint PDF of X and Y:
Code: 
X\Y	1	2
0 	0.1	0.3
1	0.05	0.1
2	0.2	0.25

So:
P(X = 1| X+Y=2) = 1/2?
P(X <= 1 and Y <= 2) = 1/3?

I don't get either of those. How did you get those answers?
 

Thread 'Finding the nth roots of a complex number'

There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
View full post »

Similar threads

Probability problem -- The joint PDF of X and Y is uniform on this rectangle....
Replies
11
Views
2K
Solving the wave equation with piecewise initial conditions
Replies
11
Views
2K
N-dimensional broken stick problem -- find joint density
Replies
3
Views
915
Determine marginal densities and distributions from joint density
Replies
7
Views
1K
Determine marginal distribution of random vector on unit sphere
Replies
9
Views
2K
Getting the probability distribution of a random variable
Replies
2
Views
1K
How should I use the Jacobi equation to show this?
Replies
4
Views
2K
Two cards are drawn from a deck without replacement
Replies
6
Views
2K
Volume between a region (above x-axis and below parabola) and a surface
Replies
4
Views
2K
Probability/Random variables question
Replies
4
Views
1K

Hot Threads

Recent Insights

Back
Top