UGC/CBSE NET December 2015, Paper 1, Answer Keys
A group of 210 students appeared in some test. Then mean of 1/3rd of students is found to be 60. The mean of the remaining students is found to be 78. The mean of the whole group will be
(1) 80
(2) 76
(3) 74
(4) 72
Answer: (4) 72
A group of 210 students appeared in some test. Then mean of 1/3rd of students is found to be 60. The mean of the remaining students is found to be 78. The mean of the whole group will be
(1) 80
(2) 76
(3) 74
(4) 72
Answer: (4) 72
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