Question

If the mean of the numbers 10, 11, 16, x, 20 is 15, find the value of x

Answer 1

Step-by-step explanation:

$\implies$ $Mean={\Large\frac{Sum\:of\:Numbers}{No.\:of\:digits}}$

$\implies$ $15={\Large\frac{10+11+16+x+20}{5}}$

$\implies$ $15×5=x+57$

$\implies$ $x=75-57$

$\implies$ $\boxed{x=18}$

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