IF THE CLASSES ARE 10-20, 20-30, 30-40... THEN IN WHICH CLASS SHOULD THE OBSERVATION 30 BE INCLUDED.
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IF THE CLASSES ARE 10-20, 20-30, 30-40... THEN IN WHICH CLASS SHOULD THE OBSERVATION 30 BE INCLUDED.
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Step-by-step explanation: 30-40
because from 20 it is starting so it wall fall on 20-30
Answer:
20-30
make me as Brainliest