<p>The percentage marks obtained by student in a class test are recorded in the table below. </p>
<div class="table-container"><table><colgroup><col style="width: 50px;"><col style="width: 50px;"><col style="width: 50px;"><col style="width: 50px;"><col style="width: 50px;"></colgroup><thead><tr><th style="text-align: center"><p>$35$</p></th><th style="text-align: center"><p>$58$</p></th><th style="text-align: center"><p>$85$</p></th><th style="text-align: center"><p>$45$</p></th><th style="text-align: center"><p>$63$</p></th></tr></thead><tbody><tr><td style="text-align: center"><p>$65$</p></td><td style="text-align: center"><p>$75$</p></td><td style="text-align: center"><p>$48$</p></td><td style="text-align: center"><p>$29$</p></td><td style="text-align: center"><p>$38$</p></td></tr><tr><td style="text-align: center"><p>$59$</p></td><td style="text-align: center"><p>$67$</p></td><td style="text-align: center"><p>$69$</p></td><td style="text-align: center"><p>$68$</p></td><td style="text-align: center"><p>$55$</p></td></tr><tr><td style="text-align: center"><p>$90$</p></td><td style="text-align: center"><p>$81$</p></td><td style="text-align: center"><p>$78$</p></td><td style="text-align: center"><p>$74$</p></td><td style="text-align: center"><p>$70$</p></td></tr><tr><td style="text-align: center"><p>$58$</p></td><td style="text-align: center"><p>$70$</p></td><td style="text-align: center"><p>$62$</p></td><td style="text-align: center"><p>$72$</p></td><td style="text-align: center"><p>$71$</p></td></tr></tbody></table></div>
<ol class="i-list"><li><div class="list-item-paragraph">Represent the above data in a stem-and-leaf diagram.</div></li><li><div class="list-item-paragraph">Find the percentage of students who have a mass of at most $70$ marks. </div></li></ol>

The percentage marks obtained by student in a class test are recorded in the table below. 

Represent the above data in a stem-and-leaf diagram.

Find the percentage of students who have a mass of at most $70$ marks. 

Statistics: Stem-and-Leaf Diagram and Percentage Calculation

Statistics: Stem-and-Leaf Diagram and Percentage Calculation

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