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In a class of 21 students, each scored differently, P's rank from the bottom is 9th , while Q's rank from the top is also 9th . How many students are
Question

In a class of 21 students, each scored differently, P's rank from the bottom is 9th , while Q's rank from the top is also 9th . How many students are ranked between Q and P ?

A.

4

B.

2

C.

5

D.

3

Correct option is D

If Q is 9th from the top, then there are 8 students above Q.
If P is 9th from the bottom, then there are 8 students below P.
Since there are 21 students in total, and 8 students above Q and 8 students below P,
there are 21 - 8 - 8- 2 = 3 ( -2  for P and Q) 
Therefore, there are students ranked between Q and P.
Thus, correct option is (d).

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