The average of six numbers is 30.If the average of first four is 25 and that of last three is 35, the fourth number is : A) 25 B) 30 C)35 D)40
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renu16:
Why we add 100 and 105 ?
As its 1st 4 nos n last 3nos when we add it become7 n starting its given average of 6 nos so both ans when we subtract we get fourth nos
Ok thnku :)
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