The students given in which of the following options can be the only students in a study group?
Explanation:
Let us start with H (least marks). If H is the monitor any student whose marks are within 10% range i.e., from 55.8 to 68.2 can be in his group. ∴ If H is the monitor only B can be in his group.
Similarly, we can make the following table.
In each of the options only 4 students should be part of a study group, hence monitor must be from one of the four students in each of the options.
Option (a): If A is monitor, B cannot be part of that study group. If B is monitor, A cannot be part of that study group. If D is monitor, B cannot be part of that study group. If F is monitor, B cannot be part of that study group. ∴ only A, B, D and F cannot be part of a group.
Similarly, we can eliminate options (b) and (d) as well.
Option (c): If I is monitor, all four i.e., C, I, J and L can be part of the group.
Hence, option (c).
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