Ana-Alexandra Kimm submitted 20 Apr at 19:12 Here are five cards. 1 5 7 11 One of the cards is removed. The mean of the numbers on


Ana-Alexandra Kimm submitted 20 Apr at 19:12
Here are five cards.
1
5
7
11
One of the cards is removed.
The mean of the numbers on the remaining four cards is 6
Which card was removed?
You must show your working,


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