Question

the average of 25 results is 20 and if 4 is added to each result then the average will be what?​

Answer 1

Answer:

Step-by-step explanation:

First we have to calculate the sum (x) of the original numbers as shown below:

mean = sum (x)/20 numbers

25 = x/20

x = 500

So, the sum of all 20 numbers was 500.

Now, in removing 4 from each of the 20 numbers, we can determine how much the total number will be.

20 x 4 = 80

Remove this from the previous total:

500 - 80 = 420

Now, we have a new total (420) with the same amount of numbers (20), so we can determine a new average as:

Mean = sum/numbers

mean = 420/20

mean = 21

Answer 2

=25–4=21

=25

Total of 20 numbers =25*20=500