If A and B are two sets such that set A is a subset of B, and "Pr" represents the probability, then Pr(A and B) will be:
A) Pr[A].
B) Pr[B].
C) Pr[A-B].
D) Pr[A+B].

Name: If A and B are two sets such that set A is a subset of B, and "Pr" represents the probability, then Pr(A and B) will be: A) Pr[A]. B) Pr[B]. C) Pr[A-B]. D) Pr[A+B].
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Question

If A and B are two sets such that set A is a subset of B, and "Pr" represents the probability, then Pr(A and B) will be:
A)   Pr[A].
B)   Pr[B].
C)   Pr[A-B].
D)   Pr[A+B].

Quizplus · Accepted Answer

Since A is a subset of B, the probability of A and B occurring together is simply the probability of A occurring, because every element of A is also in B.

If a and B Are Two Sets Such That Set