In a class test +5 marks for correct and -3 marks for incorrect answer and no marks for not attempting any questions .                                                                      Radhika scored 14marks lf she has got 4 correct answer how many questions has she attempt incorrectly?                                                                           Mohini scores (-5) marks she has got 2 correct answer how many questions has she attempt incorrectly?                                                                            Rakesh scores 23 marks by attempting 19 questions how many questions has he attempted correctly and incorrectly?