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MaTEX Probabilidad

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Soluciones a los Ejercicios 34<br />

Ejercicio 4.<br />

Conocemos<br />

P (A) = 3<br />

P (B) =<br />

4<br />

1<br />

8<br />

a) por la definición de condicionada<br />

b) por el suceso contrario<br />

P (A|B) =<br />

c) y por la propiedad aditiva<br />

P (A ∩ B)<br />

P (B)<br />

P (A ∩ B) = 1<br />

10<br />

= 1/10<br />

1/8<br />

= 2<br />

5<br />

P (A|B) = 1 − P (A|B) = 1 − 2 3<br />

=<br />

5 5<br />

P (A ∪ B) =P (A) + P (B) − P (A ∩ B)<br />

= 3 1 1 31<br />

+ − =<br />

4 8 10 40<br />

Ejercicio 4<br />

MATEMATICAS<br />

1º Bachillerato<br />

A<br />

d<br />

B<br />

s = B + m v<br />

r = A + l u<br />

SOCIALES<br />

<strong>MaTEX</strong><br />

<strong>Probabilidad</strong><br />

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