The average of six numbers is m and the average of three of these is y. If the avearge of the reamining three is Z, then:
Explanation:
Sum of six numbers = 6 × m = 6m
Sum of first three numbers = 3 × y = 3y Sum of last three numbers = 3 × z = 3z
Sum of all 6 numbers = Sum of first 3 numbers + Sum of last 3 numbers ⇒ 6m = 3y + 3z ⇒ 2m = y + z
Hence, option (a).
» Your doubt will be displayed only after approval.
Help us build a Free and Comprehensive Preparation portal for various competitive exams by providing us your valuable feedback about Apti4All and how it can be improved.