Question
The average of six numbers is 54. When two more numbers are
included, the average increases by 3. Find the average of the numbers included.Solution
Sum of the 6 numbers = 54 Ă— 6 = 324
New average = 54 + 3 = 57
Sum of 8 numbers = 57 Ă— 8 = 456
Sum of new 2 numbers = 456 - 324 = 132
Required average = 132 Ă· 2 = 66
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