Verified answer

Answer:

Mean of given observations = sum of given observations/ total number of observations Mean of 25 observations = 27

∴ Sum of 25 observations = 27 × 25 = 675 If 7 is subtracted from every number,

then the sum = 675 – (25 × 7) = 675 – 175 = 500

then new mean = 500/25 = 20

Thus, the new mean will be 20.