Study the following pie chart carefully to answer the questions. Percentagewise distribution of teachers who teach six different subjects shown below.

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?

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342

340

341

343

answer is A.

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Detailed Solution

Given that total number of educators = 1800.
From pie chart,
Question Image

Distribution of Physics teachers = 17 %,
Distribution of English teachers = 27 %, Distribution of Biology teachers = 12 %,
Distribution of Mathematics teachers = 13 %
Then,
Number of teachers teaching English

= 27 % of 1800 = 27100 × 1800 = 27 × 18 = 486

Number of teachers teaching Physics

= 17 % of 1800

= \frac{17}{100} \times 1800

= 17 \times 18

= 306

Number of teachers teaching Mathematics

= 13 % of 1800 = 13100 × 1800 = 13 × 18 = 234

And
Number of teachers teaching Biology

= 12 % of 1800 = 12100 × 1800 = 12 × 18 = 216

Then,
Difference between the total number of instructors who combine teaching Physics and English and the total number of instructors who combine teaching Mathematics and Biology
= 486 + 306 - (234+216)