Question

an examination consider of 100 questions two marks are awarded for every correct options if one mark is deducted for wrong and half mark is deducted for every question Left, then a student score 135 instead if half mark is deducted for every wrong answer and one Mark is deducted for every question left then a student score 123 find the number of questions left unattended by the student
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Answer 1

Answer:

24

Step-by-step explanation:

where x is correct answers

y is incorrect answers

z is answers left blank