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70020030040
https://adamaths.com/forum/viewtopic.php?f=53&t=989
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70020030040
Posted:
Wed Aug 23, 2017 7:17 pm
by
ada
Sam has $10$ friends at his birthday. Their ages are:<br>  $12,12,13,12,13,12,10,13,12,11$<br>What is their mean age?