Six bags of marbles contain $$19$$, $$21$$, $$27$$, $$32$$, $$37$$ and $$40$$ marbles respectively. One of the bags contains red marbles only. The other five bags do not contain any red marbles and are labelled \textquotesingle$$X$$\textquotesingle, Jaslin takes three of the \textquotesingle$$X$$\textquotesingle{} bags and George takes the remaining \textquotesingle$$X$$\textquotesingle{} bags. If Jaslin gets twice as many marbles as George, how many red marbles are there? 
Overseas Competition->Knowledge Point->Combinatorics->Logical Reasoning->Reasoning by Conditions Overseas Competition->Knowledge Point->Counting Modules->Permutations and Combinations->Combinations