A.P（A） must be equal to P（B）
B.P（A） must be greater thanP（B）
C.P（A） must be less than P（B）
D.P（A） must be equal to P（A│B）
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Exhibit 2 The following represents the probability distribution for the daily demand of computers at a local store.
Refer to Exhibit 2.The probability of having a demand for at least two computers is（）
A.0.7
B.0.3
C.0.4
D.1.0
A.0.0896
B.0.2936
C.0.0413
D.0.0007
A.a probability function
B.a random variable
C.thee xpected value
D.random function
A.0.4332
B.0.9332
C.0.0668
D.0.5668
A.1.1022
B.2
C.30
D.1.4847
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One rule that must always be followed in constructing frequency distributions is that （）.
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