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    PERMUTATION AND COMBINATION A teacher prepares...

    PERMUTATION AND COMBINATION

    A teacher prepares a test. She gives 5 objective type question out of which 4 have to be answered. Find the total ways in which they can be answered if the first 2...
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    This question is not from GMAT preparation. This...

    This question is not from GMAT preparation. This is from cracking the GRE from princeton review. Since i got stuck by this question that why asked it, and yes the correct answer is 16%
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    help me with this standard deviation question

    The fourth grade at school X is made up of 300 students who have a total weight of 21,600 pounds.
    If the weight of these four graders has a normal distribution and standard deviation equals 12...
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