Question

6.The mean of 10 numbers is 20, If 5 is subtracted frome very number ,what will be the
new mean.​

Answer 1

Step-by-step explanation:

mean=Sum of observations / no. of observations

20=X/10

x=200

•Total observations : 10

5 is subtracted from every no. means from all 10 observation 5 is Subtracted .

then 10 x 5 = 50 is substracted .

• remaing Sum of observations=200-50

= 150.

new mean = 150/10

=> 15.