Question

find the range of interval 45-65​

Answer 1

65-45=20 is the answer.

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Answer 2

ANSWER

⇒ Classmark= 2

Lowerlimit+Upperlimit

⇒ Given class interval is 50−60

⇒ Lower limit =50 and upper limit =60

∴ Classmark= 250+60

= 2110

=55

∴ The class mark of class onterval 50−60 is 55.