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 cross-section of a cannel is a trapezium in shape. If the cannel is 16 m wide at the top and 4 m wide at the bottom and the area of cross-section is 700 sq m, the depth of cannel is?

 Option A: 76

 Option B: 28

 Option C: 27

 Option D: 80

 Option E: 70
[EX A]: Option E

[EX Q]: Question: If x is to be chosen at random from the set {1, 2, 3} and y is to be chosen at random from the set {5, 6, 7}, what is the probability that xy will be even?

 Option A:  1/6

 Option B:  1/3

 Option C:  1/2

 Option D:  2/3

 Option E:  5/6
[EX A]: Option E

[EX Q]: Question: Average of 7 results is 121. If the average of first three results is 115 and average of last three results is 120 Then find the fourth result?

 Option A: 142

 Option B: 150

 Option C: 126

 Option D: 185

 Option E: 165
[EX A]:
Option A