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second moment

n.
1.the expected value of the square of the deviations of a random variable from the point of origin

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    Idiom of the Day

    fast buck
    money earned quickly and easily
    The man is always trying to make a fast buck without working hard.



    1.
    Choose an idiom to replace the expression in the brackets:
    The picture of the restaurant`s main dish (makes me very hungry).

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