One of the most important and exam oriented question from Chapter name- Arithmetic Progression
Chapter number- 9
Exercise :- 9.6
This type of question has been asked in previous years exams.
In this question we have been given that the first and the last terms of an A.P. are 7 and 49 respectively.
Also sum of all its terms is 420
Now we have to find the common difference
CBSE DHANPAT RAI publication
CBSE Mathematics Class 10th