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Total Probability & Bayes' Theorem Starter Quiz
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Three unbiased coins are tossed. What is the probability of getting at least 2 tails?
A box contains 4 bad and 6 good tubes. Two tubes are drawn at a time from the box.The first tube found out to be good, then probability that the other one is also good is
A speaks truth in 70% cases and B speaks truth in 85% cases. The probability that they speak the same fact is ______ .
A bag contains 15 defective items and 35 non defective items. If three items are selected at random without replacement, what will be the probability that all three items are defective?
A problem in statistics is given to four students A, B, C and D and their chances of solving it are respectively. The probability that the problem will be solved is _________.
Suppose we have 2 bags. Bag 1 contains 3 black and 4 red marbles. Bag 2 contains 3 black and 6 red marbles. A person tosses a coin. If it shows head, he goes to bag 1, else bag 2 and draws a marble. If the marble drawn is black, then the probability that it comes from bag 1 will be _________.
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