In a class of 30 students, no two students share a rank in any subject. Neha’s rank in Science is 7th from the top. Her rank in Mathematics, counted from the bottom, is 5 more than her rank in Science counted from the bottom. What is her rank in Mathematics from the top?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 2nd
Change the Science rank to a rank from the bottom, add 5, then change back with rank from the top = total − rank from the bottom + 1.
Science rank from the bottom \(=30-7+1=24\)th
Mathematics rank from the bottom \(=24+5=29\)th
Mathematics rank from the top \(=30-29+1=2\)nd