Discussion

Explanation:

The probability of winning in the international competition is very less (5%). So the students selected for it should have a greater chance of scoring cent percent.
 
Option (1) is eliminated because 4 & 11 score cent percent just once.

In option (2), the combined number of times cent percent is scored is 15 + 12 + 20 = 47

In option (3), the combined number of times cent percent is scored is 7 + 10 + 6 = 23

In option (4), 2 of the members score cent percent less number of times. Combined cent percent is 2 + 20 + 5 = 27

In option (5), the combined number of times cent percent is scored is 7 + 8 + 1 = 16

Hence, option (b).

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