In a class Students are seated in 15 rows. There are 15 students in the first row and 16 students in the second row. In each subsequent row there are 2 more students than in the previous row. Find the total number of students in the class? Choose the correct choice from the following answers:
A) 406	B) 420	C) 521	D) 460	E) 421
The first row has 15 students. The remaining 14 rows forms an AP with first term 16 and last term 42 with an average of 29. The total number of students in the class is  29*14+15= 
<gadget id="calculator"> 29*14+15</gadget>
<output>421</output>
421   Answer is 421.
<result>E</result>
In a class Students are seated in 15 rows. There are 15 students in the first row and 16 students in the second row. In each subsequent row there are 2 more students than in the previous row. Find the total number of students in the class?