The mean of the given data is 84. If 6 is added to each observation and then divided by 9 the new mean is______ a)90 b)99 c)10 d)20
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The average or mean 'increases' by 'k', when each term of the observation (data) in increased by 'k'.
So, when '6' is added to each observation, new mean = 84+6 =90
Now, when each observation is divided by 'k', the mean also gets divided by 'k'.
Hence, final mean = 90/9 = 10.
So, when '6' is added to each observation, new mean = 84+6 =90
Now, when each observation is divided by 'k', the mean also gets divided by 'k'.
Hence, final mean = 90/9 = 10.
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