The average of six numbers is x and the average of three of these is y. If the average of the remaining three is 2, then
(1) x = y + z
(2) 3x = y + z
(30) 2x = v + z
(4) x = 2y + 2z
(1) 1
(2) 2
(3) 3
(4) 4
EXPLANATION
If the average of six numbers is denoted as x and the average of three of these is y, with the average of the remaining three being 2, then the equation 2x =y+z holds true.
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