In a row of students, Harry is twentieth from the left end and Mark is twenty-fourth from the right end.
Peter is eighteenth from the right of Harry and adjacent to Mark How many students are there in the
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Answer: In a row of students, Avantika is thirteenth from the left end and Manav is tenth from the right end
12 students Avantika -----------N Students --------- Manav 9 Students
Total = 12 + 1 + N + 1 + 9 = 23 + N
Avantika and Manav interchange their positions
12 students Manav -----------N Students --------- Avantika 9 Students
Avantika becomes twenty-fourth from the left end
23 Students --------- Avantika 9 Students
Total = 23 + 1 + 9 = 33
23 + N = 33
=> N = 10
12 students Manav ----------10 Students --------- Avantika 9 Students
9 + 1 + 10 + 1 = 21
Manav New Position from Right end = 21st Positions
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