Find the value of X if the mean of the following data is 10: 6.7,9, 11, x, 12, 13, 14
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10 is the value of x
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A N S W E R :
Given observations are :
=6+7+9+11+X+12+13+14
=72+X
Sum of all observations = 72+X
Number of all observations = 8
Mean = Sum of all observations/ Number of all observations
=>(72+X)/8
=>72+X = 80=>72+X = 10×8
=>72+X = 80
=>X = 80-72
=>X = 8
Answer:
The value of X for the given problem is 8
Option D
Used formulae:
Mean = Sum of all observations/ Number of all observations
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