Answer :

Final answer:

To calculate the average score, you would add up all the scores and then divide by the number of scores. In this case, you add (5 * 10) + (3 * 15) + (2 * 20) to get 135. Dividing 135 by 10, the total number of scores, gives you an average of 13.5.

Explanation:

To calculate the average score from these given scores, you need to sum all of the scores, then divide that total by the number of scores. So, the total sum of your scores is as follows: (5 * 10) + (3 * 15) + (2 * 20) = 50 + 45 + 40 = 135.

Since you have 10 scores altogether, the average would be calculated as thus: 135 / 10 = 13.5. Hence, the average score is 13.5.

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