Probability Question 161

Question: If A and B are two events such that $ A\subseteq B, $ then $ P( \frac{B}{A} )= $

Options:

A) 0

B) 1

C) 1/2

D) 1/3

Show Answer

Answer:

Correct Answer: B

Solution:

Since $ A\subseteq B\Rightarrow A\cap B=B\cap A=A $

Hence $ P( \frac{B}{A} )=\frac{P(B\cap A)}{P(A)}=\frac{P(A)}{P(A)}=1 $ .