P(A) means "Probability of Event A" The complement is shown by a little mark after the letter such as A' (or sometimes Ac or A): P(A') means "Probability of the complement of Event A" The two probabilities always add to 1.
Answer:
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Its basically 7 see there is nothing but the number 7 which means as to an expression its 7.
D they all have the same slope.
