If {A} and {B} are any two events such that {P}(\overline{ {A}})=0.4, {P}(\overline{ {B}})=0.3, {P}( {A} \cup {B})=0.9, then what is the value of {P}(\overline{ {A}} \cup \overline{ {B}}) equal to?

UPSC NDA I 2013 Mathematics Paper

Question : 56 of 120

Marks: +1, -0

If A and B are any two events such that P(A)=0.4, P(B)=0.3,P(A∪B)=0.9, then what is the value of P(A∪B) equal to?

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