Word Count : 484

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The given marks of 30 students are: 42, 55, 67, 72, 48, 63, 59, 74, 81, 65, 58, 69, 77, 84, 71, 62, 57, 66, 73, 60, 75, 79, 68, 64, 53, 70, 61, 56, 76, 82 The range of marks is from 42 to 84. Taking class intervals of width 10, the frequency distribution is: | Marks Interval | Frequency (f) | | -------------- | ------------: | | 40–49 | 2 | | 50–59 | 6 | | 60–69 | 10 | | 70–79 | 9 | | 80–89 | 3 | | Total | ______ ____ ____ __________ ________ ___.
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