which type of class interval 0-10;10-20;20-30 are
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So, for 0-10, upper limit = 10 and lower limit = 0. Hence, class interval = 10-0 = 10. Similarly, for all classes, 10-20, 20-30, 30-40, 40-50, 50-60. Class interval=20−10=30−20=40−30=50−40=60−50=10
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