Arithmetic mean
- Arithmetic Mean = $$ \dfrac{x_{1}+x_{2}+x_{3}…x_{n}}{n}$$
- The arithmetic mean = $$\frac{Sum of all the terms}{Number of terms}$$
- If two numbers A and B are in A.P then arithmetic mean= $$\frac{a+b}{2}$$
- Inserting 'n' means between two numbers a and b.
- The total terms will become n+2, a is the first term and b is the last term
- Then the common difference d= $$\frac{b-a}{n+1}$$
- The last term b=a+(n+1)d
- The final series is a, a+d, a+2d,....
