Question

find the value of x if the mean of the following data is 10: 6, 7, 9, 11, x, 12, 13, 14​

Answer 1

Answer:

mean = sum of observation/total no. of observation

10 =( 6+7+9+11+x+12+13+14)/8

80 = 72+x

x = 8

Answer 2

Given:

The given data 6, 7, 9, 11, x, 12, 13, 14​

The mean of the given data is 10

To find:

The value of x

Solution:

The given data 6, 7, 9, 11, x, 12, 13, 14​

The mean of the given data is 10

Mean = Sum of the observations / Number of observation

Mean = $\frac{6+7+9+11+x+12+13+14}{8}$

Mean = $\frac{72+x}{8}$

Mean = 10

10 =  $\frac{72+x}{8}$

10 × 8 = 72 + x

80 = 72 + x

x = 80 - 72

x = 8

Final answer:

The value of x is 8