A) 100
B) 95
C) 105
D) 85
Correct Answer: C
Solution :
Each section of class 2 uses 15 chalk pieces. 7 sections of class 2 will use \[\text{15 }\times \text{ 7 }=\text{ 1}0\text{5}\] chalks pieces. \[\begin{align} & \underline{\begin{matrix} T & O \\ ^{3}1 & 5 \\ \times & 7 \\ \end{matrix}} \\ & \underline{\,1\,\,\,\,0\,\,\,5} \\ \end{align}\]
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