syedwahib
syedwahib syedwahib
  • 04-02-2020
  • Mathematics
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mean of 10 observations is 2.5.if one observation 2.5 is deleted,determine the new mean​

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sammieyemite
sammieyemite sammieyemite
  • 04-02-2020

Answer: 2.5

Step-by-step explanation:

Mean m = Sum s ÷ no of observation n

m = 2.5, n = 10

2.5 = s ÷ 10

s = 10 × 2.5

s = 25.

If one observation 2.5 is deleted from sum 25, new sum equals 25 — 2.5 = 22.5.

The no of observation becomes 9.

Therefore new mean = 22.5 ÷ 9

m = 2.5.

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