If the mean of the observation is 9, The mean of the last three
observation is?
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If the mean of the observation x, x+3, x+5, x+7 and x+10 is 9, then mean of the last three observations is. Solution : Given that, the meanof theobservation x, x+3, x+7 and x+10 is 9. Hence, the mean of last three observations is 1113.
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