# please show me how to answer this problem

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• Nov 30th 2007, 01:44 AM
jim1174
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
• Nov 30th 2007, 03:35 AM
Plato
$P(X \geqslant 12) = \sum\limits_{k = 12}^{20} {{{20} \choose k} \left( {0.7} \right)^k \left( {0.3} \right)^{20 - k} }$