The marks of 20 students are given below. What is the frequency of the class interval 50 – 55? 62, 50, 61, 37, 54, 41, 47, 51, 60, 55, 60, 68, 51, 68, 52, 58, 46, 52, 63, 57.
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frequency of class interval 50-55 is 7
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