SOLUTION: I have 15 different books, 5 were written by Lewis Carroll. I decide to take four books and select then at random what is the probability as a proper fraction that two of the books

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: I have 15 different books, 5 were written by Lewis Carroll. I decide to take four books and select then at random what is the probability as a proper fraction that two of the books      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 950358: I have 15 different books, 5 were written by Lewis Carroll. I decide to take four books and select then at random what is the probability as a proper fraction that two of the books I take will be by Lewis Carroll?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
I have 15 different books, 5 were written by Lewis Carroll. I decide to take four books and select then at random what is the probability as a proper fraction that two of the books I take will be by Lewis Carroll?
-----
# of pairs of Carroll books:: 5C2 = 10
---
# of random pairs of books:: 15C2 = 105
----
P(2 Carroll books) = 10/105 = 2/21
------------
Cheers,
Stan H.
-----------------