Three tests of a course carry weights 30 percent, 50 percent and 20 percent. A student scores 80, 70 and 90 marks in them respectively. What is the student's weighted average score?

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Accepted Answer

77. Weighted average = 0.3(80) + 0.5(70) + 0.2(90) = 24 + 35 + 18 = 77. The plain average 80 is wrong because the three tests do not count equally.

Three tests of a course carry weights 30 percent, 50 percent and 20 percent. A student scores 80, 70 and 90 marks in them respectively. What is the student's weighted average score?

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