Where's the error in my gas mixture composition calculation?

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MMCS
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Attached is the question and my working, my answers don't match up to the given answers, but they still seem right. Can anybody see where the mistake is?
 

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Your calculations look alright to me but an expert's view on the matter will be definitely welcome. Have you asked your professor?
 
I don't see anything wrong about your numbers.
 
Ok thanks. The answers provided are the ones given by the professor, ill assume he has made an error.
 

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