The problem requires selecting a group of 3 agents from four: Alpha (A), Beta (B), Gamma (G), and Delta (D). There are specific incompatibility rules:
We need to determine if a valid group of 3 can be formed under these conditions.
Let's examine the possibilities by considering which agents could be part of a group of 3:
If Alpha (A) is selected, Beta (B) cannot be selected. The group must consist of A and two others from {G, D}. The only remaining pair is {G, D}. However, Gamma (G) and Delta (D) are incompatible. Therefore, a group of 3 including A cannot be formed.
If Beta (B) is selected, Alpha (A) and Gamma (G) cannot be selected. The group must consist of B and two others from {D}. This is impossible as there is only one agent left (D). A group of 3 including B cannot be formed.
If Gamma (G) is selected, Beta (B) and Delta (D) cannot be selected. The group must consist of G and two others from {A}. This is impossible as there is only one agent left (A). A group of 3 including G cannot be formed.
If Delta (D) is selected, Gamma (G) cannot be selected. The group must consist of D and two others from {A, B}. The only remaining pair is {A, B}. However, Alpha (A) and Beta (B) are incompatible. Therefore, a group of 3 including D cannot be formed.
Since selecting any single agent prevents the formation of a compatible group of 3, it is impossible to satisfy the conditions. No combination of 3 agents can be chosen.
_________________ psychology is a branch in which the findings of psychology are applied in the field of education.
Match List-I with List-II and select the correct answer by choosing from the codes given below :
| List – I (Phenomenon) | List – II (Explanation) |
| a. Thinking | i. Process of choosing between two or more alternatives on the basis of information about them |
| b. Reasoning | ii. Processing information in various ways to move towards a desired goal |
| c. Decision making | iii. Mental activity through which we transform available information in order to reach conclusion |
| d. Problem solving | iv. An activity that involves the manipulation of mental representation of various features of the external world |
Match the following gases with their proportion.
| Gases | Percentage by volume |
| 1. Argon | (a) 0.03 |
| 2. Carbon dioxide | (b) 0.0018 |
| 3. Hydrogen | (c) 0.94 |
| 4. Neon | (d) 0.01 |