Question

Mean of 20 observations is 17 If in the observations observation 40 is replaced
by 12. Find new mean​

Answer 1

Step-by-step explanation:

sum of observations divided by number of observations.

Answer 2

Answer:

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⇨★ Solution:

Since mean of 20 observations is 17

∴ Sum of the 20 observations = 17 × 20 = 340

New sum of 20 observations = 340 – 40 + 12 = 312

New mean = 312/20= 15.6

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