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Weighted average with percentage weights

This type of question, asked 2 times: 24 Jul 2023 S4, 9 Sep 2024 S3. All 2 questions below, oldest first.

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  1. Question 1

    24 Jul 2023 S4

    65
    In an examination a candidate had to sit for three papers A, B, and C. The candidate secured 75% marks in Paper A, 80% marks in Paper B, and 60% marks in Paper C. If the weightage assigned to Papers A, B, and C were 40%, 50% and 10%, respectively, then find the weighted percentage of marks obtained by the candidate, when all the three papers were taken together.

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  2. Question 2

    9 Sep 2024 S3

    53
    A stock portfolio consists of four stocks. Stock A represents 20%20\% of the portfolio and has a return of 6%6\%. Stock B represents 30%30\% of the portfolio and has a return of 8%8\%. Stock C represents 20%20\% of the portfolio and has a return of 4%4\%. Stock D represents the remaining 30%30\% of the portfolio and has a negative-return of 5%5\%. What is the average return of the portfolio?

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