Question

the mean of 10 observation s is 20 and sum of first 5 observations among the 10 observations is 50 then find mean of the remaining next 5 observations
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Answer 1

Answer:

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

∴a=50

And mean =20

∴10a+b=20

a+b=200

b=200−9

b=200−50

b=150 

∴ mean of remaining 5 observations is given by 5b=5150=30.

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Answer 2

Answer:

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