document.write( "Question 378778: Suppose A and B are events (not necessarily mutually distinct) in a sample space S.
\n" ); document.write( "If P(A^c) = 0.2 and P(B) = 0.6 and P(A^c ∪ Bc) = 0.45, what is P(A ∪ B)?\r
\n" ); document.write( "\n" ); document.write( "what i did:
\n" ); document.write( "P(A)= 1-P(A^c) also
\n" ); document.write( "P(A)=P(A intersect B)+ P(A intersect B^c)
\n" ); document.write( "I don't know how to get P(A intersect Bc)
\n" ); document.write( "if i can get that i can get P(A ∪ B) by :
\n" ); document.write( "P(A ∪ B) = P(A) + P(B) - P(A intersect B)
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Algebra.Com's Answer #269044 by jim_thompson5910(35256) $\"\"$ $\"About$

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I'm hoping you mean P(A^c intersect B^c) because P(A^c ∪ B^c) is equal to 1 (draw a picture and you'll see that the union of A^c and B^c is the entire sample space). Is a typo? \n" ); document.write( "

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