72. a is a positive number. The unit digit of 2 9 aa a +++  cannot be? (A) 6 (B) 5 (C) 4 (D) 3 12

72. a is a positive number. The unit digit of 2 9 aa a +++  cannot be?
(A) 6
(B) 5
(C) 4
(D) 3 12

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統計： A(0), B(2), C(2), D(2), E(0) #2320029

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B1 · 2021/07/20

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55. In an experiment, it is found that the probability that a released bee will land on a painted target is . It is also found that when a bee lands on the target, the probability that the bee will attempt to sting the target is . In this experiment, what is the probability that a released bee will land on the target and attempt to sting it? (A) (B) (C) (D)

72. a is a positive number. The unit digit of 2 9 aa a +++  cannot be?
(A) 6
(B) 5
(C) 4
(D) 3 12

詳解 (共 1 筆)

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