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Mathematics, 01.04.2020 18:58 P05182010
200 elementary school students were surveyed to find their blood groups. Of those, 55 were of blood group A, 85 of blood group B, and 21 of blood group O.
What is the probability that a randomly chosen student has either blood group A or blood group B?
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200 elementary school students were surveyed to find their blood groups. Of those, 55 were of blood...
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