Question: Function P is a function defined on a set of samples S = {A, B, C, D}. We do not know the value of P

Function P is a function defined on a set of samples S = {A, B, C, D}. We do not know the value of P for all samples, but we know that P(A) = 0.3 and P(B) = 0.6. What can you say about whether P is a valid probability function? Is P definitely a probability function, possibly a probability function, or definitely not a probability function? Justify your answer.

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