Mathematics
Find the mean of 8, 12, 16, 22, 10 and 4. Find the resulting mean, if each of the observations, given above, be :
(i) multiplied by 3.
(ii) divided by 2.
(iii) multiplied by 3 and then divided by 2.
(iv) increased by 25 %.
(v) decreased by 40 %.
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