Suppose a class has 7 students. The average marks of
\( \mathrm{P} ... VIDEO
Suppose a class has 7 students. The average marks of
\( \mathrm{P} \) these students in the mathematics examination is 62 ,
W and their variance is 20. A student fails in the examination if he/she gets less than 50 marks, then in worst case, the number of students can fail is
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