Question

The mean of eight observations is 45. If one more observation is included
then the mean is 43. Find the included number.

Answer 1

Step-by-step explanation:

the number included is 27

Answer 2

Answer:

27

Step-by-step explanation:

Let sum of all numbers is E .

So, mean 45 = E / 8

E = 360

let included number is x

so sum of numbers will be 360 + x and total 9 numbers.

So , 43 = (360 + x ) / 9

387 = 360 + x

So, x = 27 which is included new number.