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| 1. |
The average of 12 numbers is 52. The average of the first 4 numbers is 42 and the average of the next 5 numbers is 56. If the 10th number is 7 less than 11th number and the 12th number is 3 less than the 11th number, then what is the average of the 10th and 12th number? |
| A. | 54 |
| B. | 57 |
| C. | 53 |
| D. | 52 |
| Answer» C. 53 | |