Question

3 संख्याओं का औसत 12 है इनमें से दो संख्याएं 13 और 15 है तो तीसरी संख्या क्या होगी​

Answer 1

The third number is 1.29

• In mathematics, the central value of a set of data is expressed as the average of a list of data. It is defined mathematically as the ratio of the total number of data points to the number of units in the list. In terms of statistics, the term "mean" also refers to the average of a certain set of numerical data. The ratio of the sum of the values in a particular set to all the values in the set is the mean value, which is the definition of the average.
• The average formula has numerous practical uses. If we were asked to determine the average male height in India or the average age of the men and women in a group, we would add up all the data and divide it by the total number of data points.

Here, according to the given information, we are given that,

The average of 3 numbers is 12 out of which two numbers are 13 and 15.

Let the third number be x.

Then, we have,

$\frac{x+13+15}{3} = 12$

Or, x = $\frac{36}{28}$

Or, x = 1.29

Hence, the third number is 1.29.

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