What$\backslash$:would$\backslash$:be$\backslash$:the$\backslash$:concentration$\backslash$:if$\backslash$:we$\backslash$:were$\backslash$:to$\backslash$:mix$\backslash$:$300\backslash$:grams$\backslash$:of$\backslash$:$\backslash$:$10\backslash \%\backslash$:$\backslash$:sugar$\backslash$:solution$\backslash$:and$\backslash$:$200\backslash$:grams$\backslash$:of$\backslash$:$\backslash$:$20\backslash \%\backslash$:$\backslash$:sugar$\backslash$:solution?