Question
The average of the first 6 numbers is 'x+40', the
average of the next 8 numbers is 'x', and the average of the remaining 6 numbers is 'x−10'. If the average of all the numbers is 70, find the value of 'x'.Solution
ATQ, 6(x+40)+8x+6(x−10)=70×20 6x+240+8x+6x−60=1400 20x+180=1400 20x=1220 x=61
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