Question

Plzzzzz answer question 12 its urgent
Related to mean

Answer 1

Answer:

Σ

i=0

n

[x

i

−

x

ˉ

]

=Σ

i=0

n

x

i

−Σ

i=0

n

x

ˉ

=n∗

x

ˉ

−

x

ˉ

∗ Σ

i=0

n

1, as

x

ˉ

same for all i

=n∗

x

ˉ

−

x

ˉ

∗n

=0

Is the answer right ?