SOLUTION: In an urn there are several color marbles, 8blue, 11white, 6yellow, 6red. You are to choose 5 marbles randomly. What is the probability that 4 or more are white marbles? (Please no

Question 376250: In an urn there are several color marbles, 8blue, 11white, 6yellow, 6red. You are to choose 5 marbles randomly. What is the probability that 4 or more are white marbles? (Please note step by step)
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
8+11+6+6=31 marbles total.
nCr=Combination of n things taken r at a time=n!/((n-r)!r!)
.
(11C4*20C1 + 11C5)/31C5
=((330*20)+462)/169911
=(6600+462)/169911
=7062/169911
=0.0416
.
Ed
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