Register to reply

Another question on probability.

by chocolatefrog
Tags: probability
Share this thread:
Apr2-12, 06:24 AM
P: 12
"Suppose that ten cards, of which five are red and five are green, are placed randomly in ten envelopes, of which five are red and five are gree. What is the probability that exactly x envelopes will contain a card with a matching colour? (x = 0, 1, 2, ..., 10)"

So basically, there are six events in sample space that 5 green envelopes have 0, 1, 2, 3, 4, or 5 green cards.

Therefore p.d.f. is 1/6 for x = 0, 2, 4, 6, 8, 10, and zero otherwise?
Phys.Org News Partner Science news on
Physicists discuss quantum pigeonhole principle
Giant crater in Russia's far north sparks mystery
NASA Mars spacecraft prepare for close comet flyby

Register to reply

Related Discussions
Probability question; Conditional probability and poisson distribution Precalculus Mathematics Homework 1
Probability Question About The Poisson Probability Distribution Calculus & Beyond Homework 15
[probability theory] simple question about conditional probability Precalculus Mathematics Homework 1
Hard probability question (cambridge exam question) Set Theory, Logic, Probability, Statistics 3
Series Question (from a probability question) Calculus & Beyond Homework 3