In a test (+5) marks are given for every correct answer and (–2) marks are given for every incorrect answer. (i) Radhika answered all the questions and
scored 30 marks through 10 correct answers. (ii) Jaya also answered all the questions and scored (–12) marks through 4 correct answers. How many incorrect answers had both Radhika and Jaya attempted?
SCERT Class 7 Telangana, Maths Chapter 1 Integers