Question

1.
The average of 5 numbers is 139. The average of 6 numbers is 151. What is
the sixth number?
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Answer 1

Step-by-step explanation:

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Answer 2

Let the sum of 5 obs be x
139=x/5
139*5=x
695 sum of all the 5 obs
Let the sum of all 6 obs be y
151=y/6
151*6=y
906=y

6th obs = y-x
=906-695
=211
6th obs =211

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