Question

If the average of 65,50,55,x is 60 then the value of 'x' is​

Answer 1

Answer:

given ,

Average of 65,60,55,x is 60

We know that ,

Average = Sum of given numbers/total number of given numbers

=> 60 = 65+60+55+x/4

=> 240 = 180 +x

=> 180+x = 240

=> x = 240-180

=> x = 60

Hence x is 60.

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Answer 2

Answer:

Step-by-step explanation:

Concept:

The concept of average will be used to solve this questions.The average is the ratio created by dividing the total number of figures in a set by the total number of figures.

Given:

Here four numbers are given.The number are $65,50,55$ and $x$ .The average of these numbers is $60$ .

To find:

We need to find out the value of $x$ that the average of these four numbers will be $60$ .

Solution:

Here the sun of the four number are $65+50+55+x$ .

The count of numbers is $4$ .

The average is $60$ .

We can write the equation as:

$\frac{65+50+55+x}{4} = 60$

Take $4$ to the R.H.S and multiply with $60$ .

$65+50+55+x=60 \times 4$

The sum of L.H.S is $170+x$

$170+x=240$

The value of $x=240-170=70$

The value of $x$ is $70$ .

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