Question

ina quiz the correct answer gives you 2 marks and a wrong answer dedects you 1 mark from the total score
ithere are 50 questions to answer if aby scored 76 marks for the quiz who mant her questions are answered

Answer 1

let X and Y be number of correct answers and wrong answers respectively

$x + y = 50$
$2x - y = 76$

Adding both equations,

$3x = 126 \\ x = 42$
then,
$y = 50 - 42 = 8$
Number of correct answers is 42