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    Given that D~B(12,0.7),calculate the smallest value of d such that P(D>d) <0.90

    Please help me solve this question and show me how to solve it as well. Thanks a lot!

    P(D> d) < 0.90 ======> P(D≤ d ) ≥0.90 --------(1)

    Try running a list of binomial CDF values in your GC and find the smallest value which fits the profile of (1). That would be your answer for d.

    Hope it helps. Peace.

    PS: Btw, this is not an undergraduate level problem. Just merely a rather standard A level statistics one.
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Updated: May 18, 2013
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