Задание по дискретной математике!. Created by AleksKAV. matematika-ru

Задание по дискретной математике!...

AleksKAV @AleksKAV

July 2022 1 7 Report

Задание по дискретной математике!

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NNNLLL54

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$D(X)=M(X^2)-M^2(X)\\\\M(X)=-5\cdot 0,4+2\cdot 0,3+3\cdot 0,1+4\cdot 0,2=-0,3\\\\M^2(X)=(-0,3)^2=0,09\\\\M(X^2)=(-5)^2\cdot 0,4+2^2\cdot 0,3+3^3\cdot 0,1+4^2\cdot 0,2=15,3\\\\D(X)=15,3-0,09=15,21\\\\\sigma (X)=\sqrt{D(X)}=\sqrt{15,21}=3,9$

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