Answer:

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Answer:

1. The sum of the 12 scores = 68 * 12 = 816

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Note that * means multiply

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Subtract the two scores 70 and 63 from 816

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new sum = 816 -70 -63 = 683

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Note that we now have the sum of the remaining 10 scores

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the mean of the remaining scores is 683 / 10 = 68.3

2. The sum of the 10 scores = 54*10=540

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Note that * means multiply

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Subtract the two scores 70 and 60 from 540

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new sum = 540 -70 -60 = 410

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Note that we now have the sum of the remaining 8 scores

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the mean of the remaining scores is 410 / 8 = 51.25

3. The sum of the 20 scores = 140 * 20= 2800

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Note that * means multiply

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Subtract the two scores 92 and 98 from 2800

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new sum = 2800-92-98 = 2610

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Note that we now have the sum of the remaining 18 scores

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the mean of the remaining scores is 2610 / 18 = 145

Step-by-step explanation:

correct me if im wrong please dont report...tnx