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Math Help - please show me how to answer this problem

  1. #1
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    please show me how to answer this problem

    please show me how to answer this problem

    a binomial probability experiment is conducted with the given parameters compute the probability of x successes in the n independent trials of the experiment
    n=20 p=0.7 x ≥ 12
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  2. #2
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    P(X \geqslant 12) = \sum\limits_{k = 12}^{20} {{{20} \choose k} \left( {0.7} \right)^k \left( {0.3} \right)^{20 - k} }
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