Question

The mean of 10 numbers is 20. If 5 is subtracted from every number, what will be the
new mean?
Find the median of the following observations. pls answer fast......​

Answer 1

Answer:

ANSWER

Mean=20

Total numbers=10

1. Total sum=200

If 5 is decreased from all numbers

mean subtracting (10×5) from 200 make total sum=200−50=150

New Mean=

10

150

=15

Hence New Mean =15

Answer 2

let, sum of obs. =x

Mean = sum of obs. / N

20 = x / 10

x =20×10 = 200

now, 5 is subtracted from 10 number

Total no. subtracted = 5×10 = 50

New mean = (x- 50)/10

= (200-50)/10

= 150/10

=15

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