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Thread: BOS Trial 2012

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    BOS Trial 2012

    Hi,
    Would anyone be able to explain the solutuion to Q10 of the 2012 BOS Trial (https://thsconline.github.io/frenzy/...U%20Trials.pdf )

    Thanks

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    Member jathu123's Avatar
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    Re: BOS Trial 2012

    Use binomial probability to get an expression involving n and sub in the options to find which one is the closest

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    Re: BOS Trial 2012

    Why don't we multiply the LHS by n since there are n choices for the particular number that is rolled exactly twice?

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    Junior Member BenHowe's Avatar
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    Re: BOS Trial 2012

    Quote Originally Posted by frog0101 View Post
    Why don't we multiply the LHS by n since there are n choices for the particular number that is rolled exactly twice?
    You are picking a particular value of n, not doing it for all values of n. So to make it a bit easier to understand, say that you will complete an experiment where a die is rolled 3 times and we will record the outcome of each roll. We wish to have the outcomes as being two 1's and one not 1. What is the probability of this occurring?

    Hope this helps. Note you can also get the above by combinatorics.
    1st Year BAppFinBActStud @ MQ

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