Question

the mean of 100 observation is 60, if one observation of 50 is replaced by 110, then what will be the new mean?

Answer 1

mean = 100×60 = 6000- 50+110 = 6060÷100= 60.60 is the new mean of the 100 observation .

Answer 2

Answer:

60.6

Step-by-step explanation:

Mean of 100 observations is 60

$Mean = \frac{\text{Sum of observations}}{\text{No. of all observations}}$

$60 = \frac{\text{Sum of observations}}{100}$

$60 \times 100 = \text{Sum of observations}$

$6000 = \text{Sum of observations}$

Now we are given that one observation of 50 is replaced by 110

So, new sum = 6000 -50+110=6060

So, new mean = $\frac{6060}{100}$

                       =60.6

Thus the new mean is 60.6