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Mathematics
OpenStudy (anonymous):

George has 9/10 of a cup of milk. He uses 1/2 of that amount. How much does he have left to drink?

OpenStudy (anonymous):

The book gave the answer of 2/5. But that can't be right. 9/10 must be right.

OpenStudy (zarkon):

2/5 is the answer if you start with 9/10 and then drink half a full glass 9/10-1/2=2/5

OpenStudy (anonymous):

wait that is incorrect

OpenStudy (anonymous):

9/20 is the right answer

OpenStudy (zarkon):

though that is not the original question

OpenStudy (zarkon):

the answer to the above question is 9/20...I'm just pointing out what the question was probably trying to ask

OpenStudy (anonymous):

indeed :)

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