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#reading-9-probability-concepts

A special case of the multinomial formula is the combination formula. The number of ways to choose *r* objects from a total of *n* objects, when the order in which the *r*objects are listed does not matter, is

nCr=(nr)=n!(n−r)!r!nCr=(nr)=n!(n−r)!r!

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**Summary **

objects can be labeled with k different labels, with n 1 of the first type, n 2 of the second type, and so on, with n 1 + n 2 + … + n k = n, is given by n!/(n 1 !n 2 ! … n k !). This expression is the multinomial formula. <span>A special case of the multinomial formula is the combination formula. The number of ways to choose r objects from a total of n objects, when the order in which the robjects are listed does not matter, is nCr=(nr)=n!(n−r)!r!nCr=(nr)=n!(n−r)!r! The number of ways to choose r objects from a total of n objects, when the order in which the r objects are listed does matter, is nPr=n!(n

objects can be labeled with k different labels, with n 1 of the first type, n 2 of the second type, and so on, with n 1 + n 2 + … + n k = n, is given by n!/(n 1 !n 2 ! … n k !). This expression is the multinomial formula. <span>A special case of the multinomial formula is the combination formula. The number of ways to choose r objects from a total of n objects, when the order in which the robjects are listed does not matter, is nCr=(nr)=n!(n−r)!r!nCr=(nr)=n!(n−r)!r! The number of ways to choose r objects from a total of n objects, when the order in which the r objects are listed does matter, is nPr=n!(n

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