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Mathematics 14 Online
OpenStudy (anonymous):

Ben and Jen each have a bag of marbles. The marbles are either purple or orange, and there are 5 pieces of each colour in each bag. Ben takes a marble out of his bag, and it is coloured purple. The probability that Jen takes out a purple marble from her own bag on her first attempt equals A. 1/5 B. 1/10 C. 1/2 D. 1/4

OpenStudy (anonymous):

I say B... Anyone agree or disagree?

OpenStudy (anonymous):

I disagree. what's so special about the purple that she only has a 1/10 chance?

OpenStudy (anonymous):

Well isn't there 10 marbles in each of their bags?

OpenStudy (anonymous):

yes, there is

OpenStudy (anonymous):

So there's 10 in each bag and 5 of each colour

OpenStudy (anonymous):

So it could be like 5/10 and them reduced? 0.o

OpenStudy (anonymous):

aha! :)

OpenStudy (anonymous):

So it's 1/2!!!!!

OpenStudy (anonymous):

YEP

OpenStudy (anonymous):

We make a kicka** team bro lol

OpenStudy (anonymous):

:)

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