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Data Handling — MATHS STD 7 — Question

Gujarat BoardEnglish MediumSTD 7MATHSData Handling5 Marks
Question
Number of children in six different classes are given below. Represent the data on a bar graph.
ClassNumber of children
V125
VI110
VII100
VIII95
IX90
X70
(i) Find the average number of children in the classes.
(ii) Find the ratio of students of Class VI to the students of Class VIII.
✓

Answer

Representation of number of students in different classes (from V to X).
Image
(i) For average number of children,
The sum of given number of children
$
\begin{aligned}
=125+110+100+95+90+70=590 \\
\text { Average/Mean } =\frac{\text { Sum of osbervations }}{\text { Number of observations }} \\
=\frac{590}{6}=98.33=98
\end{aligned}
$
Hence, average number of children in each class is 98.
(ii) Ratio $=\frac{110}{95}=\frac{22}{19}$
Hence, ratio is $22: 19$.

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