Miss Jenny is separating some candies for class A and class B. If each student in class A gets $4$ candies, $20$ more candies are needed. If each student in class B can get $6$ candies, there will be $16$ candies left. It is known that the number of students in class A is twice of class B. How many candies does Miss Jenny have? 
Overseas Competition->Knowledge Point->Word Problem Modules->Distribution Problems