Question

Average of 80 numbers are 42. When 5 more numbers are included, the average of 85 numbers become 45. Find the average of 5 numbers.

Answer 1

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Average = Sum of number/ Total number

Sum of 80 Numbers = 80 x 42 = 3360

Sum of 85 Numbers = 85 x 45 = 3825

Now Sum of 5 Numbers = 3825 - 3360

= 465
Average of 5 Numbers = 465/5

= 93 Answer

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