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If the average of 8 and x is 10 and the average of 7 and y is 11, what is the average of x and y?

发布日期:2021-09-11

If the average of 8 and x is 10 and the average of...
A

9.0

B

10.5

C

12.0

D

13.5

E

15.00

标签: average average average

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