Question

If the average mean of students weekly test marks is 50. If data is 5,6,7,4,3,x . Find the value of x ​

Answer 1

Answer:

The answer to the question is

275

Answer 2

Answer:

Value of $x$  is $275$ .

Step-by-step explanation:

To find : value of $x$ .

Given : average mean of students weekly test marks is $50$ .

Given data : $5,6,7,4,3,x$

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 :  $Average\ or\ mean =\frac{\text { sum of all the observations }}{\text { total of observations }}$
• Here, sum of observations $= 5 +6+7+4+3+x$  

                                                     $= 25 + x$

• Total number of observations $= 6$
• Average mean = $50$

• Substituting values in above formula,

        $50 =\frac{25 + x}{6}\\\\ 50 \times 6 = 25 + x \\\\ 300 = 25 + x \\\\ 300 - 25 = x\\\\x = 275$