Category : 12th Class
Ranking Test
In this type of questions, generally the ranks of a person both from the top and from the bottom are mentioned and the total number of persons is asked. However, sometimes this question is put in the form of a puzzle of interchanging seats by two persons.
Example:
(a) 31 (b) 32
(c) 33 (d) 34
(e) None of these
Ans. (b)
Explanation: Clearly, the whole class consists of:
(i) 6 students who have ranks higher than Joseph;
(ii) Joseph; and
(iii) 25 students who have ranks lower than Joseph, i.e., \[\left( 6+1+25 \right)=32\] students.
(a) 24th (b) 25th
(c) 26th (d) 27th
(e) None of these
Ans. (d)
Explanation: Clearly, number of boys towards the left of Daniel \[=\left( 40-14 \right)=26.\]
So, Daniel is 27th from the left end. Hence, the answer is (d).
(a) 39 (b) 40
(c) 41 (d) 42
(e) None of these
Ans. (b)
Explanation: Clearly, according to the given conditions, there are 15 boys to the left of A, as well as to the right of C. Also, B lies between A and C such that there are 3 boys between A and B; and 4 boys between B and C.
So number of boys in the row \[=\text{ }\left( 15+1+3+1+4+1+15 \right)=40\]
Hence, the answer is (b).
(a) 7th (b) 11th
(c) 14th (d) 18th
(e) None of these
Ans. (c)
Explanation: Shilpi’s new position is 13th from left. But it is the same as Sukriti’s earlier position which is 6th from the right.
Thus; the row consists of \[\left( 12+1+5 \right)=18\] girls.
Now, Preeti’s new position is Kamya’s earlier position which is 5th from the left
Number of girls to the right of Preeti \[=\left( 18-5 \right)=13.\]
So, Sukriti’s new position is 4th from the right.
Hence, the answer is (c).
(a) 36 (b) 37
(c) 39 (d) 38
(e) None of these
Ans. (d)
Explanation: Clearly, total number of boys in both the rows
= (Number of boys in Jeevan’s row) + (Number of boys in Vikas’ row)
\[=\text{ }\left( 6+1+10 \right)\text{ }+\text{ }\left( 9+1+11 \right)\text{ }=\text{ }\left( 17+21 \right)=38\]
(a) 3 (b) 7
(c) 12 (d) 23
(e) None of these
Ans. (c)
Explanation: Let the number of boys be x. Then, number of girls \[=2x\]
\[x+2x=60\text{ }or\text{ }3x=60\text{ }or\text{ }x=20\]
So, number of boys = 20 and number of girls = 40
Number of students behind Kamal in rank \[=\left( 60-17 \right)=43\]
Number of girls ahead of Kamal in rank = 9
Number of girls behind Kamal in rank \[=\left( 40-9 \right)=31\]
Number of boys behind Kamal in rank \[=\left( 43-31 \right)=12.\]
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