The mean observations is 17. If 25 is added to the sum of the observations, find the new sum of the observations
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according to the question
mean = sum of observation/number of observation
17 = x/20
x = 17×20=340
now, if 25 is added to it's sum so the new observation = (340 + 25) / (20+25)
observation = 365 / 45
so , observation = 73/9
parambandi:
from where 20 came
this question os in my book
so there was 20
ok
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