- #1
jksacc
- 1
- 0
Hi all
I recently ran into this problem:
I have two bins. Each bin contains N numbered balls, from 1 to N.
For both the bins, the probability of the ball numbered k to be
selected equals to P(ball-k-selected)=k/SUM(1:N) (in other versions
this can be any given probability distribution)
Simple case:
Having selected 1 ball from the first bin, and 1 ball from
the second bin, i want to find the probability of the ball
having the same number.
If i am correct, the probability for this is SUM(k=1:N) (P(ball-k-selected)^2).
Complex case:
Having selected m balls from the first bin, and m balls from
the second bin, i need the probability of holding at least
one pair of balls with the same number at the end of the
experiment.
Assumption: The selection is without replacement. However, for
simplicity we can assume that the probability of a ball to be selected
remains stable during the experiment, and is given by
P(ball-k-selected)=k/SUM(1:N)
If something is not clear, please let me know.
Thanks in advance for any contributions!
I recently ran into this problem:
I have two bins. Each bin contains N numbered balls, from 1 to N.
For both the bins, the probability of the ball numbered k to be
selected equals to P(ball-k-selected)=k/SUM(1:N) (in other versions
this can be any given probability distribution)
Simple case:
Having selected 1 ball from the first bin, and 1 ball from
the second bin, i want to find the probability of the ball
having the same number.
If i am correct, the probability for this is SUM(k=1:N) (P(ball-k-selected)^2).
Complex case:
Having selected m balls from the first bin, and m balls from
the second bin, i need the probability of holding at least
one pair of balls with the same number at the end of the
experiment.
Assumption: The selection is without replacement. However, for
simplicity we can assume that the probability of a ball to be selected
remains stable during the experiment, and is given by
P(ball-k-selected)=k/SUM(1:N)
If something is not clear, please let me know.
Thanks in advance for any contributions!