Solution
The correct answer is 2/7
Explanation
Javed was given $\dfrac{5}{7}$ of a basket of oranges.
It was a full basket before oranges were given to Javed.
Hence to obtain the fraction of oranges left in the basket, we need to subtract $\dfrac{5}{7}$ from $1$
= $1$ - $\dfrac{5}{7}$ = $\dfrac{7}{7}$ - $\dfrac{5}{7}$ = $\dfrac{7-5}{7}$ = $\dfrac{2}{7}$
Therefore, the fraction of oranges left in the basket = $\dfrac{2}{7}$