Question

if 8 no mean is 25 . If 5 is added to first 4 no and 5 is subtracted from last four no what is the new mean

Answer 1

Answer:

Step-by-step explanation:

hello

Answer 2

Answer:

25

Step-by-step explanation:

Let the sum of the first four no.s be 'x' and the last four no.s be 'y'.

(x+y)/8 = 25  =>  (x+y) = 200

Now, acc. to the question,

{[x+(4*5)]+[y-(4*5)]}/8 = (x+20+y-20)/8

=>  (x+y)/8 = 25

Therefore, the new mean is 25.