You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

[EX Q]: Question: The average marks of a class of 35 students is 45 and that of another class of 55 students is 65. Find the average marks of all the students?

 Option A: 52.6

 Option B: 52.4

 Option C: 52.1

 Option D: 57

 Option E: 52.9
[EX A]: Option D

[EX Q]: Question: The wages earned by Robin is 38% more than that earned by Erica. The wages earned by Charles is 60% more than that earned by Erica. How much % is the wages earned by Charles more than that earned by Robin?

 Option A: 23%

 Option B: 27.53%

 Option C: 30%

 Option D: 50%

 Option E: 100%
[EX A]: Option B

[EX Q]: Question: If the average (arithmetic mean) of the four numbers 3, 25, 52, and (N + 1) is 50, then N =

 Option A:  119

 Option B:  120

 Option C:  121

 Option D:  122

 Option E:  129
[EX A]:
Option A