Probability Question 233
Question: If A and B are two events such that $ P(A)=0.4 $ , $ P(A+B)=0.7 $ and $ P(AB)=0.2, $ then $ P(B)= $
[MP PET 1992]
Options:
A) 0.1
B) 0.3
C) 0.5
D) None of these
Show Answer
Answer:
Correct Answer: C
Solution:
Since we have $ P(A+B)=P(A)+P(B)-P(AB) $
$ \Rightarrow 0.7=0.4+P(B)-0.2\Rightarrow P(B)=0.5 $ .
BETA
