An urn contains nine red balls and seven blue balls. Four balls are drawn at random, without replacement.
(a) What is the probability that all four balls are red? (Round your answer to four decimal places.)
(b) What is the probability that two of the balls are red and
two are blue? (Round your answer to four decimal places.)
a)
P(all red) = 9C4/16C4 = 0.0692
b)
P(2 red and 2 blue) = 9C2*7C2/16C4 = 0.4154
An urn contains nine red balls and seven blue balls. Four balls are drawn at random,...