Question

The mean of 20 observations is 50. If each observation is increased by 5 then find the new or 120 mean.

Answer 1

Answer:55

Step-by-step explanation:mean=sum of obser vations ÷number of obser vations =>50=sum of observations ÷20

=>sum of observations =1000

New mean=(1000+5×20)÷20

=1100/20

=55

Answer 2

The new mean is 55

Step-by-step explanation:

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

The mean of 20 observations is 50.

So, $50 = \frac{Sum}{20}$

$50 \times 20 = Sum$

1000 = Sum

If each observation is increased by 5

So, New sum = 1000+20(5)=1100

New mean $=\frac{1100}{20}=55$

Hence The new mean is 55

#Learn more:

If the mean if 18 observations is 25 and each observation is increased by 5 ,find the new mean

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