Question

If the mean of 3 7 11 and X is 9 what is the value of x = ?

Answer 1

Answer:

The value of x will be 15.

Step-by-step explanation:

Given: The mean of 3, 7, 11, and X is 9.

We have to find the value of x.

• As we know, the mean of a data set is the sum of the terms divided by the total number of terms.
• The formula for mean is:

        $\text { Mean }=\frac{\text { Sum of terms }}{\text { Number of terms }}$

We are solving in the following way:

We have,

The mean of 3, 7, 11, and X is 9.

So, the value of x will be:

$\text { Mean }=\frac{\text { Sum of terms }}{\text { Number of terms }}$

$=>9=\frac{3+7+11+x}{4} \\\\=>9=\frac{21+x}{4} \\\\=>9\times4=21+x\\=>36=21+x\\=>36-21=x\\=>x=15$

Hence, the value of x will be 15.

NOTE:

Q. If the mean of 3, 7, 11, and X is 9, what is the value of x?