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  3. The average of x and y is 16 and the average of x, y, and z is What is the value of z?

The average of x and y is 16 and the average of x, y, and z is What is the value of z?

admin2012-01-15  18
问题 The average of x and y is 16 and the average of x, y, and z is What is the value of z?
选项 A、16
B、22
C、34
D、45
E、66
答案C
解析
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