in an examination for each correct answer 5marks is awarded and for each wrong answer (-2) is awarded. 1. sumon answer all the qu

in an examination for each correct answer 5marks is awarded and for each wrong answer (-2) is awarded. 1. sumon answer all the questions. but her 16 answers were correct and obtained 64. 2. jaya answer all the questions. but she could answer only 5 question correctly and obtained (-6). how many questions were answered incorrectly by them.​