Ayisha Asked a Question
April 7, 2020 10:37 ampts 20 pts
2. A group of 210 students appeared in some test. The mean of 1/3 rd 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
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  • Rishab Soni Best Answer
    The mean of 1/3 of the student is 60 = The mean of 1/3 of the students of 210 is 60 = The mean of 70 students is 60 = Total score of 60 students = 60 X 70 = 4200 (1) Total mean of ...
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    Rishab Soni
    To calculate the mean, we have formula Total Score / Toal number. We already have total number as 210. Now we need total score. For tha, the next info provided is 1/3 of students...
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