Question

Sum of 15 observation data of (434+x). If the mean of data x, find x?

Answer 1

Answer:

Sum of 15 observations = 434 + x

Mean = x

Equation formed :

$\tt {\frac {434+x}{15} = x}$

=> 434 + x = 15x

=> 434 = 14x

=> x = 31