Yash scored 40 marks in a test getting 3 marks for each right answer and loosing 1 marks for

Yash scored 40 marks in a test getting 3 marks for each right answer a

1.	Yash scored 40 marks in a test getting 3 marks for each right answer and loosing 1 marks for
Answer» Let the number of right answers and wrong answers be x and y respectively.According to the question,{tex}3x - y = 40{/tex} ...(i){tex}4x - 2y = 50\u200b\u200b\u200b\u200b\u200b\u200b\u200b{/tex}{tex}\\Rightarrow{/tex}{tex}2x - y = 25{/tex} ...(ii)Subtracting equation (ii) from equation (i), we obtain:{tex}x = 15{/tex}Substituting the value of x in equation (ii), we obtain:{tex}30 - y = 25{/tex}{tex}y = 5{/tex}Thus, the number of right answers and the number of wrong answers is 15 and 5 respectively. Therefore the total number of questions is 20.