probability? - XP Math - Forums

 XP Math - Forums probability?

 07-23-2007 #1 sweet_candy Guest   Posts: n/a probability? A bag contains 5 red marbles, 7 blue marbles, and 10 green marbles. One marble is drawn at random. What is the probability that it will be either:a. red or green?b. blue or green?c. red or blue?
 07-23-2007 #2 Blergh Guest   Posts: n/a a. 15/22b. 17/22c. 12/22
 07-23-2007 #3 nvn Guest   Posts: n/a (a) 15/22(b) 17/22(c) 12/22
 07-23-2007 #4 Jack Sparrow Guest   Posts: n/a a) p(r U g) = p(r) + p(g) - p(r ^ g) p(r) = (5/22)*(4/21) p(g) = (10/22) p(r ^ g) = (5/22)*(10/21)*2proceed others same like this

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