Question 1116449
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Since the ratio  {{{80/25}}} is between 3 and 4, at least 4*2 = 8 Chaperones are required (are needed) for 80 students, according to the school guidelines.
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    Actually, these guidelines are uncompleted:

    While they establish the rule for every 25 students, they say nothing for the number of students in the range from 1 to 24.

    From the point of view of SOLVING the given problem, this uncompletenes is FATAL, and, formally speaking, 
    does not allow to solve the problem without additional assumptions.
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