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.

Question: The distance between two cities A and B is 330 Km. A train starts from A at 8 a.m. and travel towards B at 60 km/hr. Another train starts from B at 9 a.m and travels towards A at 75 Km/hr. At what time do they meet?

 Option A: 10 a.m

 Option B: 10.30 a.m

 Option C: 11 a.m

 Option D: 11.30 a.m

 Option E: None of these
Option C

Question: The average age of 3 boys is 15 years and their ages are in the proportion 1:2:3. The age of the youngest boy is?

 Option A: 10 years

 Option B: 12 years

 Option C: 15 years

 Option D: 18 years

 Option E: 7.5 years
Option E

Question: How many words, with or without meaning, can be formed using all letters of the word RED using each letter exactly once?

 Option A: 6

 Option B: 7

 Option C: 8

 Option D: 9

 Option E: 10

Option A