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: The average of 4,8,12 and x is 10. Find the value of x?

 Option A: 10

 Option B: 16

 Option C: 15

 Option D: 24

 Option E: 12
[A]: Option B


[Q]: Question: The ratio of three numbers is 1:2:3 and their sum is 60. The second number of the three numbers is?

 Option A: 24

 Option B: 26

 Option C: 20

 Option D: 29

 Option E: 30
[A]: Option C


[Q]: Question: Two cards are drawn together from a pack of 52 cards. The probability that one is a spade and one is a heart, is:

 Option A: 13/109

 Option B: 13/162

 Option C: 13/111

 Option D: 13/102

 Option E: 13/112
[A]:
Option D