Mathematics
If different values of variable x are 9.8, 5.4, 3.7, 1.7, 1.8, 2.6, 2.8, 8.6, 10.5 and 11.1; find (i) the mean (ii) the value of
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The mean of 15 observations is 32. Find the resulting mean, if each observation is :
(i) increased by 3
(ii) decreased by 7
(iii) multiplied by 2
(iv) divided by 0.5
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(vi) decreased by 20%
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