Question

The mean of 12+x , 14+2x , 16 , 18+x , 20 , 22-x and 24-3x is :
options are
16
18
20
20+x​

Answer 1

Answer:

And the answer is 18

Step-by-step explanation:

Add all the numbers

12+14+16+18+20+22+24=16

then add all the variables

x+2x+x-x-3x=0

mean=sum of observations /total number of observations

mean=126/7=18

Answer 2

Given : 12+x,14+2x,16,18+x, 20,22-x and 24-3x

To Find : Mean

16

18

20

20+x​

Solution:

Mean = Sum of all observations / number of observation

12  + x

14 + 2x

16

18 + x

20

22 - x

24 - 3x

______

126 + 4x - 4x  =  126

Sum of all observations = 126

Number of observation  = 7

Mean = 126/7  = 18

The mean of 12+x,14+2x,16,18+x, 20,22-x and 24-3x is : ​ 18

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