In a class test containing 15 questions, 4 marks are given for every correct answer and (–2) marks are given for every incorrect answer. (i) Gurpreet attempts all questions but only 9 of her answers are correct. What is her total score? (ii) One of her friends gets only 5 answers correct. What will be her score?

(i) Marks given for one correct answer $=4$ So, marks given for 9 correct answers $=4\times 9=36$ Marks given for one incorrect answer $=-2$ So, marks given for $6=(15-9)$ incorrect answers $=(-2)\times 6=-12$ Therefore, Gurpreet's total score $=36+(-12)=24$ (ii) Marks given for one correct answer $=4$ So, marks given for 5 correct answers $=4\times 5=20$ Marks given for one incorrect answer $=(-2)$ So, marks given for $10(=15-5)$ incorrect answers $=(-2)\times 10=-20$ Therefore, her friend's total score $=20+(-20)=0$