Question
The average of six numbers is 82. When two more numbers
are included, the average increases by 4. Find the average of the numbers included.Solution
Sum of the 6 numbers = 82 × 6 = 492
New average = 82 + 4 = 86
Sum of 8 numbers = 86 × 8 = 688
Sum of new 2 numbers = 688 - 492 = 196
Required average = 196 ÷ 2 = 98
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