36.The number of students in four classes A, B, C, D and their respective mean marks obtained by each of the class are given below: Class A Class B Class C Class D Number of students 10 40 30 20 Arithmetic mean 20 30 50 15 The combined mean of the marks of the marks of four classes together will be

37.Which of the following statements say the same thing? : (i) “I am a teacher“ (said by Arvind), (ii) “I am a teacher“ (said by Binod), (iii) “My son is a teacher“ (said by Binod’s father), (iv) “My brither is a teacher“ (said by Binod’s sister), (v) “My brither is a teacher“ (said by Binod’s only sister), (vi) “My sole enemy is a teacher“ (said by Binod’s only enemy),

38.Research can be classified as

39.The University Grants Commission was constituted on the recommendation of

40.Which of the following statements is correct?