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Mathematics 24 Online
OpenStudy (anonymous):

a classroom contains 14 girls and 16 boys. a student is picked at random and leaves the room. another student is then picked at random. find the probability that: 1 both are boys, 2 both are girls...

OpenStudy (lgbasallote):

probability first one is a boy is 16/30 probability the second one is a boy is 15/29 probability both are boys is 16/30 x 15/29 got it?

OpenStudy (anonymous):

yep but what about the girls? :D in the answers it says that the probablility of both girls is 91/435? how did they do that?

OpenStudy (lgbasallote):

probability first girl is 14/30 probability second one is 13/29 probability both are girls 14/30 x 13/29

OpenStudy (anonymous):

oh hah same thing, lool im so dumb! hehe thanks again :D

OpenStudy (lgbasallote):

hehe <tips hat>

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