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 fourth proportional to 12, 14 and 12 is?

Option A: 14

Option B: 66

Option C: 77

Option D: 88

Option E: 99
Option A

Question: The cost of Type 1 material is Rs. 15 per kg and Type 2 material is Rs.20 per kg. If both Type 1 and Type 2 are mixed in the ratio of 2 : 3, then what is the price per kg of the mixed variety of material?

Option A: Rs. 19

Option B: Rs. 16

Option C: Rs. 18

Option D: Rs. 17

Option E: Rs. 21
Option C

Question: If one-third of one-fourth of a number is 18, then three-tenth of that number is:
A. 35

Option A: 23

Option B: 87

Option C: 26

Option D: 64.8

Option E: 01
Option D