Combinations Probability?

This post was written by admin on January 1, 2009
Posted Under: Mathematics
(: Muffin Man :) asked:


1. A bag contains 12 white golf balls and 8 orange golf balls.

a) Write a combination expression for teh number of ways that four white balls can be chosen from the bag.

b) Write a combination expression for the number of ways that four balls of any colour can be chosen from the bag.

c) Use your answers above to find the probability of choosing four white golf balls.

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Reader Comments

a) choose 4 out of 12 white balls C(12,4)
b) choose 4 out of 20 balls C(20,4)
c) C(12,4)/C(20,4) = 12*11*10*9 / 20*19*18*17 = .102

#1 
Written By holdm on January 2nd, 2009 @ 3:49 pm

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