Question

the mean of 100 observation is 50. If the observation 50 is removed by 150, what will be the resulting mean.​

Answer 1

Answer:

If one of the observation which was 50 is replaced by 150, the resulting mean will be. Solution : Hence, the resulting mean is 51.

Step-by-step explanation:

Answer 2

Answer:

Solution :

Given, mean of 100 observation is 50.

Here, n=100 and x¯=100

Then, mean =Σni=1xin

∴1100×Σ100i=1xi=50⇒x100i=1i=5000……………(i)

Now, the observation 50 is replaced by 150, then Eq. (i) becomes,

Σ100i=1xi=5000−50+150=5100

∴ Resulting mean =Σ100i=1xi100=5100100=51

Hence, the resulting mean is 51.

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