the average arithmetic mean of 10, 30 and 50 is 5 more than the average of 20, 40 and x. Then x= ?
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Answer: x=8
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ans is 15 as mean of 10 , 30 , 50 is 10+30+50/3=30
ATQ. 20 + 40 + X/3 = 25
X= 15
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