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OpenStudy (blake3299):
How many combinations of 4 students can a teacher choose from 30 students? A. 810,000 B. 27,405 C. 120 D. 657,720
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OpenStudy (blake3299):
i think it is D
OpenStudy (anonymous):
B
OpenStudy (blake3299):
why is that i am new at combations
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