A solution contains 4g of $Na_2CO_3$ and NaCl 250ml.25ml of this solution required 50ml of N/10 HCl for complete neutralization.Calculate % composition of mixture.

Question

$\begin{array}{1 1}(a)\;66.25\%,33.75\%&(b)\;60\%,40\%\\(c)\;60.25\%,40.75\%&(d)\;65\%,35\%\end{array}$