Question

[Lại Thị Kim Ngân]

b=5/30+15/90+25/150+35/210+45/270

Answer 1

[Kuroba Kaito]

\(B=\frac{5}{30}+\frac{15}{90}+\frac{25}{150}+\frac{35}{210}+\frac{45}{270}\)

\(B=\frac{1}{6}+\frac{1}{6}+\frac{1}{6}+\frac{1}{6}+\frac{1}{6}=\frac{5}{6}\)