Among the following methods which is not a probability sampling method?

option 2

Quota sampling

• In an alloy, zinc and copper are in the ratio 1 : 2. In the second alloy, the same elements are in the ratio 2 : 3. If these two alloys be mixed to form a new alloy in which two elements are in the ratio 5:8, the ratio of these two alloys in the new allow
• Study the following information carefully to answer these questions.A vehicle starts from point P and run 10 km towards North. It takes a right turn and runs 15 km. Now it runs 6 km after taking a left turn. Finally, it takes a left turn, runs 15 km and s
• Rs.180 are to be divided among 66 persons ( men and women). The ratio of the total amount of money received by men and women is 5 : 4. But the ratio of the money received by each man and woman is 3: 2. The number of man is
• Suppose A is an abstract class, B is a concrete subclass of A, and both A and B have a default constructor. Which of the following is correct?1. A a = new A();2. A a = new B();3. B b = new A();4. B b = new B();
• Study the following information carefully and answer the questions given below:Each of the six persons, P, Q, R. S. T and U has travelled to different number of countries. R has travelled to more number of countries than only S and T. Q has travelled to m