Traditional Culture Encyclopedia - Weather inquiry - Haze weather questionnaire
Haze weather questionnaire
(1) The number of students participating in this survey is: 20÷5%=400 (people).
400× 15%=60 (person),
A: There are 60 people who know better;
(2) The central angle corresponding to part D is: 360× (1-5%-15%-45%) =126;
(3) According to the meaning of the question:
2000× (1-5%-15%-45%) = 700 (person),
A: There are 700 students who don't know the smog weather.
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