1.

If A and B are any two events such that P(overset(_)A)=0.4, P(overset(_)B)=0.9 then what is the value of P(overset(_)A cup overset(_)B) equal to

Answer»

0.2
0.5
0.6
0.7

Solution :We have `P(overset(_)A CUP overset(_)B)=P(overset(_)A)+P(overset(_)B)-P(overset(_)A cap overset(_)B)`
`P(overset(_)A )=P(overset(_)B)-P(overset(_)A cup overset(_)B)"By(De-Morgan's LAW")`
`P(overset(_)A )=P(overset(_)B)-(1-P(overset(_)A cup overset(_)B))=4+3-(1-9)=6`


Discussion

No Comment Found

Related InterviewSolutions