Time remaining:
Finite probability question

Algebra
Tutor: None Selected Time limit: 0 Hours

An urn contains six red balls, five black balls, and four green balls. If two balls are selected at random without replacement from the urn, what is the probability that a red ball and a black ball will be selected? My book says the answer is 2/7.

Oct 7th, 2014

what is the probability that a red ball and a black ball will be selected

P(B) and P(W)= 6/15*5/14=1/7

P(W) and P(B)= 5/15*6/14= 1/7

                       = 1/7+1/7

                       = 2/7

Oct 7th, 2014

Studypool's Notebank makes it easy to buy and sell old notes, study guides, reviews, etc.
Click to visit
The Notebank
...
Oct 7th, 2014
...
Oct 7th, 2014
Dec 3rd, 2016
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer