An exam has a weightage of 30%. If a student has a score of 82% before the exam what is the student's score if the marks scored in the exam are 40, 50 and 60.

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justaguide | College Teacher | (Level 2) Distinguished Educator

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An exam has a weightage of 30%. The student's score before the exam is 82%. If the student scores 40% in the exam, the score of the student is 0.82*0.7 + 0.4*0.3 = 0.694.

Similarly, if the student scores 50%, the score after the exam is 0.82*0.7 + 0.5*0.3 = 0.724 and if the student scores 60%, the score after the exam is 0.82*0.7 + 0.6*0.3 = 0.754

The score of the student after the exam is 69.4%, 72.4% and 75.4% if the score in the exam is 40%, 50% and 560% respectively.

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