SOLUTION: A urn contains 12 red and 16 blue balls. If five balls are drawn at random, find the probability that: A) exactly four are blue B) the balls are drawn blue, red, red, blue in

Algebra ->  Probability-and-statistics -> SOLUTION: A urn contains 12 red and 16 blue balls. If five balls are drawn at random, find the probability that: A) exactly four are blue B) the balls are drawn blue, red, red, blue in      Log On


   



Question 863748: A urn contains 12 red and 16 blue balls. If five balls are drawn at random, find the probability that:
A) exactly four are blue
B) the balls are drawn blue, red, red, blue in that order?

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi
28 Balls: 12R, 16B
five balls are drawn at random
P(exactly 4B) = %2816C4%29%2812C1%29%2F%2828C5%29
P(B,R,R,B) = %2816%2F38%29%2812%2F37%29%2811%2F36%29%2815%2F34%29%2824%2F33%29