rrect Question 33 You performed a serial dilution and obtain the following results: Dilution factor: 10-6: count: >1000 Dilution factor: 10-7: count: 546 Dilution factor: 10-8: count: 65 Volume plated at each dilution: 0.2mL What is the best estimate of the CFU of the original culture? 6.5x109 CFU/mL O 3.25x1010 CFU/mL O 2.73x1010 CFU/mL O 3x109 CFU/mL O 6.11x108 CFU/mL O 5.46x10° CFU/mL 5x109 CFU/mL Cannot be determined O I haven't a clue O 109 CFU/mL

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