Average, also known as mean, is a fundamental concept in mathematics and statistics. It represents the central value of a set of numbers. To calculate the average, you add up all the numbers in a given set and then divide the sum by the total count of numbers.

At the SSC and PSSSB levels, the concept of average is often covered in arithmetic or quantitative aptitude sections. Some key points to understand about averages include:

  1. Calculation: To find the average of a set of numbers, you add them up and divide the sum by the total count of numbers. For example, if you have a set of numbers {4, 6, 8, 10}, the average would be (4 + 6 + 8 + 10) / 4 = 7.
  2. Interpretation: The average represents a typical or central value of the given set. It provides a sense of the overall magnitude or tendency of the numbers.
  3. Application: Average is used in various real-life scenarios. For example, it can be used to determine the average score of a class, the average temperature of a region over a period, or the average speed of a moving object.
  4. Manipulating averages: You may encounter questions where you need to manipulate averages. For instance, finding a missing value in a set of numbers given the average and some other values.
  5. Weighted average: Sometimes, different numbers in a set may have different weights or importance. In such cases, a weighted average is used to calculate the average, taking into account the respective weights of the numbers.

It’s important to note that the specific topics and depth of coverage may vary depending on the curriculum or resources you are using. If you have access to study materials or specific questions from Gill Sir or any other source, feel free to provide more details, and I’ll be happy to assist you further.