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Data Handling — MATHS STD 8 — Question

Gujarat BoardEnglish MediumSTD 8MATHSData Handling3 Marks
Question
Study the following pie chart carefully to answer the questions.
Percentagewise distribution of teachers who teach six different subject shown below.
Image
If total number of teachers $=1800$
(i) What is the total number of teachers teaching Chemistry, English and Biology?
(ii) What is the difference between the total number of teachers who teach English and Physics together and the total number of teachers who teach Mathematics and Biology together?
✓

Answer

(i) Number of teachers teaching Chemistry
$=\frac{23}{100} \times 1800=414$
Number of teachers teaching English
$=\frac{27}{100} \times 1800=486$
Number of teachers teaching Biology
$=\frac{12}{100} \times 1800=216$
Total numbers of teachers teaching Chemistry, English and Biology $=414+486+216=1116$
(ii) Number of teachers teaching English
$=\frac{27}{100} \times 1800=486$
Number of teachers teaching Physics
$=\frac{17}{100} \times 1800=306$
Number of teachers teaching Mathematics
$=\frac{13}{100} \times 1800=234$
Number of teachers teaching Biology $=216$
$\therefore$ Difference between the total number of teachers teaching English and Physics together and the total number of teachers who teach Mathematics and Biology together
$=(486+306)-(234+216)=792-450=342$

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