Question

The average of 1, 2, x, 4 and 5 is 3. Find the value of x.​

Answer 1

Answer:

Value of $x$ is $3$ .

Step-by-step explanation:

To find : value of $x$ .

Given : the average of $1, 2, x, 4$ and $5$  is $3$ .

Solution :

• Average is the arithmetic mean.
• It is the ratio of sum of all the numbers given in data to the total number of observations.
• Formula : $Average =\frac{\text { sum of all the observations }}{\text { total of observations }}$
• Here, sum of observations $1 + 2 + x +4 +5 = 12 + x$
• Total number of observations $=5$
• Substituting values in above formula,

       $\begin{array}{r}\text { Average }=\frac{12 + x}{5} \\\\3=\frac{12 + x}{5} \\\\15 = 12 + x \\\\15 -12 = x \\\\x = 3\end{array}$

Answer 2

Answer:

answer is 3

Step-by-step explanation:

12+x/3=3

12 + x = 3×5= 15

=x=15-12=3

x=3

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