The average of 5 numbers is 84. The average of five other numbers is 80. Find the average of the ten numbers taken together.
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The average of five numbers is 40 , so the total of these five numbers will be 5x40.
The average of another six numbers is 50 , so the total of these six numbers will be 6x50.
Therefore, the average of all these taken together will be
=
5+6
(200+300)
=
11
500
=45.45
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