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.

[Q]: Question: In a test, sixty percent students passed in Maths and 65% in History, 40% passed in both of these subjects. If 90 students failed in maths and history both, then what is the total number of students?

 Option A: 600

 Option B: 650

 Option C: 700

 Option D: 750

 Option E: None of these
[A]: Option A


[Q]: Question: There are 600 employees in a room. 99% are managers. How many managers must leave the room to bring down the percentage of managers to 98%?

 Option A: 100

 Option B: 200

 Option C: 250

 Option D: 300

 Option E: 400
[A]: Option D


[Q]: Question: Of two mixers and one T.V cost Rs.7000, while two T.Vs and one mixer cost Rs.9800, the value of one T.V is :

 Option A: Rs.2800

 Option B: Rs.2100

 Option C: Rs.4200

 Option D: Rs.8400

 Option E: None
[A]:
Option C