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Shubham painted 2 / 3 of the wall space in his room. His sister Madhavi helped and painted 1 /3 of the wall space. How much did they paint together?

3. Shubham painted  \frac{2}{3}   of the wall space in his room. His sister Madhavi helped and painted \frac{1}{3}  of the wall space. How much did they paint together?

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Total wall painted   =  Wall painted by Subham + Wall pained by Madhavi

                          =\ \frac{2}{3}\ +\ \frac{1}{3}\ =\ \frac{3}{3}\ =\ 1

Hence the whole wall is painted by them.   

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