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Question Number 95912 by i jagooll last updated on 28/May/20

$$\left(\begin{array}{c}2\mathrm{n}\\ \mathrm{n}\end{array}\right)=20$$$$\mathrm{find}\mathrm{n}?$$

Commented by MJS last updated on 28/May/20

$$n=3$$

Commented by i jagooll last updated on 29/May/20

$$\mathrm{by}\mathrm{observasi}\mathrm{sir}?$$

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