jpalmer814 jpalmer814
  • 08-08-2017
  • Mathematics
contestada

P(A)=7/20,P(B)=3/5,P(A∩B)=21/100 ,P(A∪B)=?
A.
7/50
B.
91/400
C.
301/400
D.
37/50

Anything??

Respuesta :

wizard123
wizard123 wizard123
  • 08-08-2017
[tex]P(A U B) = P(A) +P(B) - P(AB) \\ \\ = \frac{7}{20} +\frac{3}{5} - \frac{21}{100} \\ \\ = \frac{35}{100} +\frac{60}{100} - \frac{21}{100} \\ \\ =\frac{74}{100} \\ \\ =\frac{37}{50}[/tex]
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