Consider that individuals will take an online test in which questions will be presented sequentially. Calculate the probabilities asked for in the contexts of each of the following. Consider rounding to the third decimal place in your calculations, probabilities in the range [0,1] and tolerance of 0.005. a. Suppose that 8 questions are removed with replacement (ie the same question can be removed more than once) from a bank of 70 questions of which the individual knows how to answer 49. What is the probability of him getting 2 or less questions right? b. Idem to the previous item, but assuming now that the questions are withdrawn without replacement. c. Assuming again the replace
Consider that individuals will take an online test in which questions will be presented sequentially. Calculate the probabilities asked for in the contexts of each of the following.
Consider rounding to the third decimal place in your calculations, probabilities in the
a. Suppose that 8 questions are removed with replacement (ie the same question can be removed more than once) from a bank of 70 questions of which the individual knows how to answer 49. What is the probability of him getting 2 or less questions right?
b. Idem to the previous item, but assuming now that the questions are withdrawn without replacement.
c. Assuming again the replacement of the questions, the candidate answers until he makes a mistake for the first time. What is the probability of getting at most 2 questions right before getting it wrong (that is, at most 3 attempts)?
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