Tổng số nu : \(N=\dfrac{2L}{3,4}=2400\left(nu\right)\)
Theo NTBS : \(\left\{{}\begin{matrix}A=T=\dfrac{2400}{2}-480=720\left(nu\right)\\G=X=480\left(nu\right)\end{matrix}\right.\)
Tỉ lệ % mỗi loại : \(\left\{{}\begin{matrix}\%A=\%\%T=\dfrac{720}{2400}.100\%=30\%\\\%G\%\%=\%X=50\%-\%A=20\%\end{matrix}\right.\)
\(L=3,4.\dfrac{N}{2}\rightarrow N=2400\left(nu\right)\)
\(\Rightarrow G=X=\dfrac{480}{2400}.100=20\%\)
\(\Rightarrow A=T=30\%N=720\left(nu\right)\)