Rameshwar

Answer to: If the sum of first n terms of an A.P. is given by $S_n = \frac{n}{2} (3n + 1)$, then the first term of the A.P. is

Given the sum of the first $ \displaystyle n $ terms of an A.P.:

$ \displaystyle S_n =...

Answer to: To calculate mean of a grouped data, Rahul used assumed mean method. He used d = (x - A), where A is assumed mean. Then $\bar{x}$ is equal to

In the assumed mean method, the mean $ \displaystyle \bar{x} $ is given by:

$ \displaysty...