We went on a trip

Grade 4, consisting of 32 students, went on a trip. The students had to bring hats, sunglasses, and water bottles.
No child forgot all of these things, but:

  • Among the students who brought hats, 9 forgot sunglasses,
  • Among the students who brought sunglasses, 7 forgot water bottles,
  • And among the students who brought water bottles, 10 forgot sunglasses.

How many students in the class brought everything needed for the trip?

Difficulty level (1 very easy - 10 very hard): 2

Topics:
Arithmetic Algebra -> Word Problems Logic -> Reasoning / Logic Set Theory Combinatorics -> Case Analysis / Checking Cases -> Processes / Procedures
Sources:
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