csateasy
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?
- A.25th
- B.26th
- C.27th
- D.28th
▶ Answer & Explanation
Correct answer: C. 27th
Initially, the boy's rank is 20th from the top. This means there are 19 students above him. When two more students join the class, his rank from the top becomes 20 + 1 = 21st. The total number of students in the class is now 45 + 2 = 47. To find his rank from the end, we subtract his rank from the top (21) from the total number of students (47) and add 1: 47 - 21 + 1 = 27th.
Source: UPSC csat 2013