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Вопрос 89

A bag holds 9 red counters and 1 blue counter, and one counter is taken at random. Select all statements that are true about taking a red counter. Select all that apply.

  1. Taking a red counter is certain, because most of the counters are red
  2. Taking a red counter is likelyПравильный ответ
  3. The probability of red is 9 out of 1, one red counter for each blue counter
  4. The probability of red is 9 out of 10Правильный ответ
  5. Taking a red counter is not certain, because the bag still holds a blue counterПравильный ответ

Объяснение

Nine of the ten counters are red, so red is drawn on nine draws in ten, a figure well above the halfway mark of the scale but short of the top of it. Calling the draw certain would require every counter in the bag to be red, and while one blue counter remains the draw can fail, so the word that fits is the one for probabilities between the middle and the top.

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Вопрос 89: A bag holds 9 red counters and 1 blue counter, and one… · Statistics and Probability · Questena