Concept is of two types

1 Two types of rice (type 1 and type 2) were mixed in the respective ratio of 1 : 3. The mixture was then sold @ 75.60 per kg to gain a profit of 20%. If the price of type 1 rice is Rs. 75 per kg, what is the price of type 2 price per kg? 2 Two types of alloy possess gold and silver in the ratio of 7 : 22 and 21 :37. In what ratio should these alloys be mixed so as to have a new alloy in which gold and silver would exist in the ratio 25:62 3 The concept of multiple inheritance is implemented in Java byI.   Extending two or more classes.II.  Extending one class and implementing one or more interfaces.III. Implementing two or more interfaces. 4 ........ is the evidence that the instrument, techniques, or process used to measure concept does indeed measure the intended concepts. 5 " A system of systematically interrelated concepts definitions and propositions that are advanced to explain and predict phenomena" is