Neco 2018 Mathematics Question 50
Practice objective / multiple choice question 50 from the 2018 Neco Mathematics examination.
A class of 8 students took a test. Their scores have a mean of \(65\) and a variance of \(9\). The teacher then records the scores of 5 additional students, whose average score is \(80\). After including these 5 scores, the variance of the combined 13 scores becomes \(16\). Find the sum of the squares of the 5 additional scores. Express your answer as an irreducible fraction.
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About This Question
This is Neco 2018 Mathematics Question 50. It is one of the objective questions from the 2018 Neco Mathematics examination.
Difficulty level: Hard .
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