In an exclusive class $10$-$20$, an observation $20$ falls in

In an exclusive class $10$-$20$, an observation $20$ falls in
  1. the next class $20$-$30$
  2. $10$-$20$
  3. both classes
  4. neither

Solution

Exclusive: upper limit excluded; $20$ goes to next class.

Asked in: MH-SSC-9

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