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A system consists of three blocks with masses (from left to right) of 3.67 kg, 1.06 kg and 7.69 kg. The leftmost block has a velocity of 3.22 m/s toward the right, the rightmost block as a velocity of 2.59 m/s toward the left. Assuming movement toward the right is positive, what is the center of mass velocity of this system?

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