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Please help Q. No 4- (a) The mean of 10 observation is 15. If an observation 12 is excluded find the new mean. (b) Find

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Q. No 4- (a) The mean of 10 observation is 15. If an observation 12 is excluded find the new mean. (b) Find mean when median = 10 and mod = 25. What kind of Sknewness do you find here? (c) Given variance (d) = 625 257- Let d = find variance of (x)

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