\(a,\) \(N=C.20=6000\left(nu\right)\)
\(L=C.34=10200\left(\overset{o}{A}\right)\)
\(b,\) \(M=N.300=1,8.10^6\left(dvC\right)\)
\(c,\) Theo bài ta có: \(\left\{{}\begin{matrix}3A-G=0\\A+G=3000\end{matrix}\right.\) \(\rightarrow\left\{{}\begin{matrix}A=750\left(nu\right)\\G=2250\left(nu\right)\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}A=12,5\%N\\G=37,5\%N\end{matrix}\right.\)
\(d,\) \(H=N+G=8250\left(lk\right)\)