suppose the mean of certain number of observation is 50 and the sum of all the observation is 450. Then find the number of observation?
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the no.of observation is 9.
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Mean of certain number of observation = 50
Sum of the observations = 450
Let the number of observations be 'x'
Mean = Sum of observations/ Number of observations
50 = 450/x
450/50 = x
x = 9
Hence number of observations = 9
Sum of the observations = 450
Let the number of observations be 'x'
Mean = Sum of observations/ Number of observations
50 = 450/x
450/50 = x
x = 9
Hence number of observations = 9
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