One type of liquid contains 20% of water and the second type of liquid contains 35% of water. A glass is filled with 10 parts of 1st liquid and 4 parts of 2nd liquid. The percentage of water in the new mixture in the glass is?  Choose the correct choice from the following
A) 22.15 % B) 23.5 % C) 24.3 % D) 25 % E) 29.6 %

Rationale: required percentage = ( 20 % of 10 + 35 % of 4 ) / 10 + 4 * 100 = 3.4 / 14 * 100 = 24.3 % answer is c
Answer: C