Amna takes a test with $$50$$ questions. Four marks are given for each correct answer but one mark is taken off for each question she gets wrong. If Amna scores $$168$$ in the test and doesn\textquotesingle t attempt $$3$$ questions at all, how many questions did she answer correctly? (There is no penalty for not attempting a question in this test that Amna takes) 
Overseas Competition->Knowledge Point->Word Problem Modules->Chicken-Rabbit Problems->Solving Chicken-Rabbit Problems by Using Hypothesis->Deducting Marks