The marks (out of 100) obtained by 50 students are to be arranged in equal-width

MATHEMATICS · Single correct · CBSE · Mathematics · Statistics · Statistics

Problem

The marks (out of 100) obtained by 50 students are to be arranged in equal-width, continuous classes. Which of the following sets of class intervals is continuous and has no overlap? (a) 0–9,  10–19,  20–29,  30–390\text{–}9,\;10\text{–}19,\;20\text{–}29,\;30\text{–}39 (b) 0–10,  11–21,  22–32,  33–430\text{–}10,\;11\text{–}21,\;22\text{–}32,\;33\text{–}43 (c) 0–10,  10–20,  20–30,  30–400\text{–}10,\;10\text{–}20,\;20\text{–}30,\;30\text{–}40 (d) 0–9,  9–18,  18–27,  27–360\text{–}9,\;9\text{–}18,\;18\text{–}27,\;27\text{–}36

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