If the total product of two workers is 80 and the total product of 3 workers is 90 then the average product of the third worker is ________ and the marginal product of the third worker is _________?

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If the total product of two workers is 80 and the total product of 3 workers is 90 then the average product of the third worker is ________ and the marginal product of the third worker is _________?

A. 160; 270
B. 10; 30
C. 10; 3.33
D. 30; 10