Answer: C) 6.7 per cent Explanation:

A solution is a homogeneous type of mixture of two or more substances. A solution has two parts:: 1. A solute and 2. A solvent.   The solute is the substance that dissolves, and the solvent is the majority of the solution.

Answer: D) Delhi Explanation: 1. Filing an RTI application with the Delhi government is now just a click away. Delhi became the second state to launch e-RTI portal that will enable citizens to file online Right to Information (RTI). Maharashtra is the first state to launch the online RTI platform. 2. The portal launched recently will enable citizens to file RTI and seek information related to 172 departments of the Delhi government including the office of the CM and his ministers. 3. The e-RTI portal, which has been designed by the National Informatics Centre (NIC), includes filling of application, payment of fees and getting replies online.

Answer: D) 17 April Explanation: World hemophilia day is observed globally on 17 April.

Answer: D) Delhi Explanation: By adhering to the green building norms for its residential colonies, the Delhi metro Railway Corporation (DMRC) has become the world's first completely green metro. The Indian Green Building Council (IGBC) awarded the Delhi metro the platinum rating for adhering to the green building norms for its 10 residential colonies.

Answer: B) 2 Explanation: Given that x = 2+ 223 + 213   So x - 2 = 223 + 213   Now cubing on both sides, we get     => x3-8-6x2+12x = 4 + 2 + 6(x-2)   Therefore, x3-6x2+6x = -6 + 8 = 2

Answer: A) 100 π Explanation: 4/3 π x 10 x 10 x 10 = 8 x 4/3 π x r x r x rr = 54π x 5 x 5 = 100π

Answer: D) All the above Explanation: The study of statistics such as births, deaths, income, or the incidence of disease, which illustrate the changing structure of human populations.   In brief, Study of both quantitative and qualitative aspects of human population. 1. Quantitative aspects include composition, density, distribution, growth, movement, size, and structure of the population. 2. Qualitative aspects are the sociological factors such as education quality, crime, diet, development, nutrition, wealth and well being.