khash mere pita ji aj jivit hote in English
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(1) The class 60- 70 has the maximum number of students i.e., 60.
(2) The classes 20 - 30 and 90 - 10 have zero frequency.
(3) The class-mark of the class having frequency of 50 students is 55.
(4) The lower and upper class limits of the class having class mark of 85 and 80 and 90.
(5) Number of students in the class 80-90 are 15.
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