Question

the mean of 10 observation is 10. sum of all observations is​

Answer 1

Answer:

ANSWER

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