Mathematics · Averages
The average of 10 data values is 56.5. The average of the first 3 data values is 50 and the average of the next 4 data values is 60. If the 8th data value is 10 less than the 9th data value and also 6 less than the 10th data value, then find the eighth data value.
- 155
- 251
- 357
- 453✓
Correct answer
53
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