Question

please answer this question with steps
not direct answer

Answer 1

Which subject's question is?

Answer 2

Sum of all observations / 2 = Average

X1 + X2 ........... + X10 / 2 = 12

X1 + X2 ............ + X10 = 24

Let X1 = 18

Therefore ...

18 + X2 .......... + X10 = 24

X2 ...... + X10 = 6 -------------------- 1

For correct observation

Since correct observation is 8 .

So

8 + X2 + ..... + X10 / 2 = 8 + 6 / 2.... ( From 1 )

= 14 / 2

= 7

So the average is 7 .

HOPE IT IS MOST HELPFUL!!!!!!!!!