Arithmetic Mean  Definition: The sum of the numerical values of each and every observation, that is divided by the total number of observations is equal to “Arithmetic Mean”.  Arithmetic Mean is also called average or mean. The Arithmetic Mean or mean or average is defined as,  Symbol:             X  = (𝚺xi)/n X = Mean […]

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 Addition – Definition and Examples In this section we will learn the basics of addition. (+) addition is a basic operation of arithmetic. To bring two or more numbers together and make a new number, is known as sum, add or total. Total is amount of two or more numbers or things.       […]

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Mean Value – Word problems    In this lesson we will learn about mean. We will also learn how to find mean of given data and solve word problems on mean. How to calculate mean Example: (1)What is the mean of  1, 2, 5, and 4. Solution : Mean = Sum of observations/Number of observations the numbers […]

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         Rules – Addition of Integers There are two conditions when adding integers.  Rule 1: When integers have same sign. Rule 2: When integers have opposite sign. (a) When integers have same sign. (b) When integers have opposite sign. a. Integers having (same)positive sign. When we add two positive integers means both […]

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