Question

if the mean of 4 observation iss x, 2x ,3x,4x is 10. then find the mean of last 3 observation​

Answer 1

Answer:

12

Step-by-step explanation:

x,2x,3x,4x are the observations.

mean :

(x+2x+3x+4x)÷4 = 10

10x÷4 = 10

10x = 10×4

x = 40 ÷ 10

x = 4

Then the 4 observations are 4 , 8 , 24 , 16

therefore, the mean of last 3 observations :

(8 + 12 + 16) ÷ 3

=12

Answer 2

Answer:

12

Step-by-step explanation:

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