NCHMCT JEE 2019 Question Paper with solutions for online practice

Question : 7 of 200

Marks: +1, -0

The mean marks obtained by 300 students in a subject are 60. The mean of top 100 students was found to be 80 and the mean of last 100 students was found to be 50. The mean marks of the remaining 100 students is:

Validate

Solution:

Required mean of the remaining 100 students

=\;{300 × 60-100 × 80-100 × 50}/{100}

=\;{18000-8000-5000}/{100}

=\;{18000-13000}/{100}=\;{5000}/{100}=50

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