Question

If the mean of 3 observations is 10 then the sum of the observations is

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

Let the addition of first 5 observation be a and next 5 be b.

∴a=50

And mean =20

∴

10

a+b

=20

a+b=200

b=200−9

b=200−50

b=150

∴ mean of remaining 5 observations is given by

5

b

=

5

150

=30.