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.
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Question: Question: A company consists of 5 senior and 3 junior staff officers. If a committee is created with 3 senior and 1 junior staff officers, in how many ways can the committee be formed?

Option A: 12

Option B: 30

Option C: 45

Option D: 80

Option E: 200

Answer: Option B

Question: Question: If x is an integer such that 5 < x < 21, 7 < x < 18, 13 > x > 2, 12 > x > 9, and x + 1 < 13, then x is

Option A: 3

Option B: 5

Option C: 7

Option D: 9

Option E: 11

Answer: Option E

Question: Question: Find the number, when 15 is subtracted from 7 times the number, the result is 10 more than twice of the number

Option A: 5

Option B: 15

Option C: 7.5

Option D: 4

Option E: 3

Answer:
Option A