Question

The arithmetic mean of number 4,9,3,2,x,5,1 is 4 .the value of x is

Answer 1

Answer:

The value of $x$ is 4.

Step-by-step explanation:

The arithmetic mean of a set of numbers is the sum of those numbers divided by the number of items.

There are 7 numbers. So we have the mean as follows.

$\dfrac{4+9+3+2+x+5+1}{7}=4\\\implies \dfrac{24+x}{7}=4\\\implies 24+x= 7 \times 4=28\\\implies x=28-24=4$

So the missing number is 4. The value of $x$ is 4.