Economist
\(50\) jars sit on a shelf, of which \(12\) are red and not round; and \(30\) are round and not red. How many jars sit on the self that are both red and round?
1. There are only \(5\) jars on the shelf which are not red and not round.
2. Of the round jars, the number of non red is \(10\) times the number of the red jars.
OA D