\(N=900\left(Nu\right)\\ a,A=T=30\%N=30\%.900=270\left(Nu\right)\\ G=X=\dfrac{N}{2}-A=\dfrac{900}{2}-270=180\left(Nu\right)\\ b,C=\dfrac{N}{20}=\dfrac{900}{20}=45\left(chu.kì\right)\)
N=900(Nu)a,A=T=30%N=30%.900=270(Nu)G=X=N2−A=900/2−270=180(Nu)b,C=N/20=\(\dfrac{900}{20}\)=45(chu.kì)