Wednesday 9 February 2011

My Averages Question

My maths teacher mr Smy gave me a maths question, totally made up in his head, and told me to go away and try to work it out.

Question: If I have 5 numbers with Mean=9, mode=10, median=11. What are the numbers?

= 10,10,11,?,?

And i said it won't work because....

  • you cant get a higher number than 11 to make 45 because it all ready adds up to 31
  • if you add 12 to that it will equal 43 then you would need a 2 and the two can't go in front of the 10 beacuase the median will change.

Luxmi 7BN

4 comments:

  1. Great reasoning, Luxmi! Well thought-out and clearly explained.

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  2. Thank you for your comments!!!

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  3. Well done Luxmi. I know where I'm coming if I need any Maths help! Miss Martin

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