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Averages · Question 31 of 62

Question 31

MediumOriginal question

A college computes the final score as 20% of the unit test, 30% of the midterm and 50% of the final exam. Lalremsiami scores 80 in the unit test, 65 in the midterm and 74 in the final exam. What is her final score?

Options for question 31

Show the answer and explanation
CorrectNot quiteAnswer A

Correct answer: A

Explanation

  1. 0.2×80=160.2 \times 80 = 16.

  2. 0.3×65=19.50.3 \times 65 = 19.5.

  3. 0.5×74=370.5 \times 74 = 37.

  4. Final score = 16+19.5+37=72.516 + 19.5 + 37 = 72.5.

Worth noting

73 is the plain average of the three scores, which ignores the weights.

Concept
Weighted score with percentage weights
Typical time
60 s
Your time
—
The rule this testsWeighted average
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Ten questions from Averages, at your own pace.

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