In a class of 45 students, a boy is ranked 20th. When two boys joined, his rank was dropped by one. What is his new rank from the end?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 27th.
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The total strength of students = 45 The rank of the boy = 20th from the end. Rank from the left end = 45 - 20 + 1 = 26th Now two boys joined, so total strength = 47 New rank = 26 + 1 = 27th from the end Hence, option 1 is the correct answer. Alternate Solution: Total Strength of the student, after joining of two students = 47 Rank of the boy dropped by 1, so new rank is: 21. New rank from the end is: 47 = 21 + X - 1 47 = 20 + X 47 - 20 = X 27 = X |