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A survey on favourite soft drinks shows that 38% like Mountain Dew, 47% like Coke, and 35% do not like either.  Use this information to answer questions #14 - 15.14)  What is the probability that a randomly person likes Mountain Dew OR Coke?    1 pointYour answer15)  What is the probability that a randomly person likes only one of these two soft drinks?    1 point

Question

A survey on favourite soft drinks shows that 38% like Mountain Dew, 47% like Coke, and 35% do not like either.  Use this information to answer questions #14 - 15.14)  What is the probability that a randomly person likes Mountain Dew OR Coke?    1 pointYour answer15)  What is the probability that a randomly person likes only one of these two soft drinks?    1 point

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Solution

Para resolver estas preguntas, primero necesitamos entender la información proporcionada y luego aplicar las reglas de probabilidad adecuadas.

Pregunta 14:

¿Cuál es la probabilidad de que una persona al azar le guste Mountain Dew O Coke?

Para encontrar la probabilidad de que una persona le guste Mountain Dew o Coke, utilizamos la fórmula de la unión de dos eventos en probabilidad:

P(AB)=P(A)+P(B)P(AB) P(A \cup B) = P(A) + P(B) - P(A \cap B)

Donde:

  • P(A) P(A) es la probabilidad de que le guste Mountain Dew.
  • P(B) P(B) es la probabilidad de que le guste Coke.
  • P(AB) P(A \cap B) es la probabilidad de que le guste tanto Mountain Dew como Coke.

De la información proporcionada:

  • P(A)=0.38 P(A) = 0.38
  • P(B)=0.47 P(B) = 0.47
  • P(No le gusta ninguno)=0.35 P(\text{No le gusta ninguno}) = 0.35

Primero, encontramos la probabilidad de que le guste al menos uno de los dos refrescos:

P(Le gusta al menos uno)=1P(No le gusta ninguno) P(\text{Le gusta al menos uno}) = 1 - P(\text{No le gusta ninguno}) P(Le gusta al menos uno)=10.35=0.65 P(\text{Le gusta al menos uno}) = 1 - 0.35 = 0.65

Ahora, sabemos que:

P(AB)=0.65 P(A \cup B) = 0.65

Entonces, podemos usar la fórmula de la unión para encontrar P(AB) P(A \cap B) :

0.65=0.38+0.47P(AB) 0.65 = 0.38 + 0.47 - P(A \cap B) [ 0.65 = 0.85

This problem has been solved

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