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: A is twice as fast as B. If B alone can do a piece of work in 18 days, in what time can A and B together complete the work?

 Option A: 10

 Option B: 16

 Option C: 18

 Option D: 6

 Option E: 12

A: Option D
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Q: Question: Find compound interest on Rs. 5000 at 12% per annum for 1 year, compounded half-yearly.

 Option A: Rs. 600

 Option B: Rs. 618

 Option C: Rs. 525

 Option D: Rs. 620

 Option E: None

A: Option B
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Q: Question: In Township K, 1/4 of the housing units are equiped with cable Tv. If 1/10 of the housing units, including 1/3 of those that are equiped with cable tv, are equipped with videocassette recorders, what fraction of the housing units have neither cable tv nor videocassette recorders?

 Option A: 23/30

 Option B: 11/15

 Option C: 7/10

 Option D: 1/6

 Option E: 2/15

A:
Option B
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