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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- Nov 30th 2007, 01:44 AMjim1174please 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 - Nov 30th 2007, 03:35 AMPlato
$\displaystyle P(X \geqslant 12) = \sum\limits_{k = 12}^{20} {{{20} \choose k} \left( {0.7} \right)^k \left( {0.3} \right)^{20 - k} } $