Answer:
B
Step-by-step explanation:
The answer relies on whether the balls are different or not.
If they are not, which is almost certainly what is intended.
If they are, the perceptive is a bit different. Your
expression gives the likelihood that a particular set of j balls
goes into the last urn and the other n−j balls into the other urns.
But there are (nj) different possible sets of j balls, and each of
them the same probability of being the last insides of the last urn, so the
total probability of completing up with exactly j balls in the last
urn is if the balls are different.
See attached file for the answer.
Answer:
the length of all sides added together
Pythagorean
Theorem as follows: A^2+B^2=C^2
The correct answer should be 20% because u were 80% certain he would remember so that means ur 20% certain he would forget