1 Answers
Option 3 : Radha
Six students: Radha, Raj, Rahul, Mira, Aarav and Arijit.
Classes: 7th, 8th, 9th, 10th, 11th and 12th (not necessarily in the same order).
1) The one who is in 12th class will perform first, then after that 11th class student will perform and so on.
2) Mira will perform immediate after the Rahul but before Arijit.
Thus, their sequence for performances is as follows:
Rahul → Mira → Arijit
There are 4 possible cases,
3) Mira does not study in 8th class.
(Thus, 3 cases arise here.)
CASE I
|
Order |
Class |
Students |
|
1 |
12th |
Rahul |
|
2 |
11th |
Mira |
|
3 |
10th |
Arijit |
|
4 |
9th |
|
|
5 |
8th |
|
|
6 |
7th |
|
CASE II
|
Order |
Class |
Students |
|
1 |
12th |
|
|
2 |
11th |
Rahul |
|
3 |
10th |
Mira |
|
4 |
9th |
Arijit |
|
5 |
8th |
|
|
6 |
7th |
|
CASE III
|
Order |
Class |
Students |
|
1 |
12th |
|
|
2 |
11th |
|
|
3 |
10th |
Rahul |
|
4 |
9th |
Mira |
|
5 |
8th |
Arijit |
|
6 |
7th |
|
4) Raj will perform immediate after Aarav but Raj neither studies in 8th class nor in 7th class.
Sequence for performance is Aarav → Raj.
Thus, case I and II get eliminated and we have left with only case III.
CASE III
|
Order |
Class |
Students |
|
1 |
12th |
|
|
2 |
11th |
|
|
3 |
10th |
Rahul |
|
4 |
9th |
Mira |
|
5 |
8th |
Arijit |
|
6 |
7th |
|
Therefore, final table is as follows:
|
Order |
Class |
Students |
|
1 |
12th |
Aarav |
|
2 |
11th |
Raj |
|
3 |
10th |
Rahul |
|
4 |
9th |
Mira |
|
5 |
8th |
Arijit |
|
6 |
7th |
Radha |
Hence, we get that Radha will perform last in the school function.