Overview: 1 questions will be solved this time.Among them
           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality C(x,22)*0.8∧x*C(22,22-x)*0.2∧(22-x) ≥0.5 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         C( x , 22 ) * 0.8 ^ x * C( 22 , 22 - x ) * 0.2 ^ ( 22 - x ) ≥0.5         (1)

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    From inequality(1)：
         x ≥ 20.62822

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    The final solution set is :
         x ≥ 20.62822

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