AleciaCassidy
05.12.2019 •
Mathematics
Here are 5 number cards 2 5 7 8 9 one of the cards is removes and the mean average of the remaining four number cards is 6. which card was removed? you must show your working
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Ответ:
7
Step-by-step explanation:
If one of the cards is removes and the mean average of the remaining four number cards is 6, then their sum is
The sum of all five cards is
Since
then the card with number 7 is removed.
Ответ: