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 Solution The mean of 5 observations is 20 . If we add one new observation then the new mean of the observations is 25 . So find out new added observation.Solution:Your problem -> The mean of 5 observations is 20 . If we add one new observation then the new mean of the observations is 25 . So find out new added observation.Here n = 5, Mean X = 20The sum of 5 observation is = X × n = 20 × 5 = 100After adding one new observation, the new Mean X = 25,the sum of 6 observation = new X × n = 25 × 6 = 150:. the new observation = 150 - 100 = 50. Solution provided by AtoZmath.com Any wrong solution, solution improvement, feedback then Submit Here Want to know about AtoZmath.com and me