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Jason has a bag that contains 888 identically shaped boxes. 6 of the boxes are blue, and 2 are green. 3 of the blue boxes have a prize, and 1 of the green boxes has a prize. Which of the following statements are true? Choose all answers that apply:

A. P(A∣B)=P(A)
B. P(B∣A)=P(B)
C. Events A and B are independent events.
D. The outcomes of events A and B are dependent on each other.

1 Answer

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Final answer:

The statements claiming that events A and B are independent and that the conditional probabilities are equal to their individual probabilities are false. Events A (drawing a blue box with a prize) and B (drawing a green box with a prize) are dependent on each other because the occurrence of one does affect the probability of the occurrence of the other.

Step-by-step explanation:

Jason has a bag that contains 888 identically shaped boxes, with 6 blue and 2 green boxes among them. To determine the truthfulness of the given statements, we must understand the concept of independent events and conditional probability. Event A represents the occurrence of drawing a blue box with a prize, and event B represents drawing a green box with a prize.

For events A and B to be independent, the occurrence of one should not affect the probability of the occurrence of the other, which means that P(A AND B) should equal P(A)P(B). However, since the outcomes of A and B are limited by the actual content of the boxes (3 blue boxes with a prize and 1 green box with a prize), the probability of one event occurring does affect the other. Therefore, events A and B are not independent. With that understanding, here is a clarification of the given statements:

  • P(A|B) != P(A) because knowing that a green box with a prize was drawn changes the probability structure for drawing a blue box with a prize, and vice-versa.
  • P(B|A) != P(B) because, once again, the occurrence of A changes the possible outcomes for B.
  • Statement C is false because events A and B are dependent events.
  • Statement D is true as the outcome of event A does affect the outcome of event B, making them dependent on each other.
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