question_answer

Vijay & Ajay are filling a fish tank with water. Vijay fills \[\frac{1}{5}\]of the tank. Ajay fills \[\frac{2}{5}\] of the tank. How much of the tank have they filled in all?

A)  \[\frac{3}{25}\]                               

B)  \[\frac{3}{10}\]

C)  \[\frac{3}{5}\]                                  

D)  \[\frac{2}{5}\]