Question

If sum of observations is 50 and number of observations are 10 , find mean ​

Answer 1

Answer:

Let the observations be x

1

,x

2

,⋯,x

50

Given sum of the deviations of 50 observations from 30 is 50

⟹

i=1

∑

50

(x

i

−30)=50

⟹

i=1

∑

50

x

i

=50×30+50=50×31

⟹

50

i=1

∑

50

x

i

=31

Mean =

50

∑

i=1

50

x

i

=31Let the observations be x

1

,x

2

,⋯,x

50

Given sum of the deviations of 50 observations from 30 is 50

⟹

i=1

∑

50

(x

i

−30)=50

⟹

i=1

∑

50

x

i

=50×30+50=50×31

⟹

50

i=1

∑

50

x

i

=31

Mean =

50

∑

i=1

50

x

i

=31

Answer 2

Answer:

Their sum of observations is 50

And number of observations are 10

So, mean = 50/10 = 5.

Hope it helps you...

Pls mrk me brainliest...