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At Lucknow Public School 1/9 students were absent in an exam and only 19/24 of those who appeared for the exam passed it. Now we know that 500 students failed in the exam. what is the Total number of students who registered for the exam :

In a class, 80% of students pass in maths exam and 70% of students pass in English exam. 10% of students fail in Both subjects and if 144 students pass in Both subejects. Find the total number of students.

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4.In a class of 36 students,1/3 of the students scored A in mathematics exam,1/2 of them scored B and the rest scored C .Find the numbers of students who scored C in mathematics exam.

1700 students took an exam 85% students passsed it. Find the number of students who failed in the exam.