Directions: Study the following information carefully and answer the questions that follow:
Percentage distribution of teachers who teach six different subjects
Total number of teachers = 1800
If two-ninths of the teachers who teach Physics are females, then the number of male Physics teachers is approximately what per cent of the total number of teachers who teach Chemistry?
» Explain it
If   2 th of physics are female teachers, then

Male teachers = 1 –  2  =  7 th of physics
9 9

Let's take x% of male physics teacher equal to Chemistry teachers, then

⇒  x% of Chemistry teacher =  7 th of physics

⇒  x% of (23% of 1800) =  7 th of (17% of 1800)

⇒  x% of 23 =  7 th of 17

⇒  x =  7  ×  17  × 100 = 57.4% ≈ 57%
9 23

Hence, option A is correct.

What is the total numbers of teachers who teach Chemistry, English and Biology?
» Explain it
(Chemistry + English + Biology)% of Total number of teachers

⇒ (23 + 27 + 12)% of 1800

⇒ 62% of 1800

⇒    62  × 1800 = 1116.

Hence, option B is correct.

What is difference between the total number of employees teacher who teach English and Physics together and total number of teacher who teach Mathematics and Biology together?
» Explain it
Req. difference = [(English + Physics) – (Mathematics + Biology)]% of 1800

⇒ [(27 + 17) – (13 + 12)]% of 1800

⇒ (44 – 25)% of 1800

⇒ 19% of 1800 =  19  × 1800 = 342.

Hence, option B is correct.

What is the ratio of the teachers who teach mathematics to the number of teachers who teach Hindi?
» Explain it
No. of teachers who teaches Mathematics : No. of teachers who teaches Hindi
⇒  13% of 1800 : 8% of 1800
⇒  13 : 8.

Hence, option D is correct.
If the percentage of Mathematics teachers is increased by 50% and percentage of Hindi teachers is decreased by 25% , what will be the total number of Mathematics and Hindi teachers together?
» Explain it
Percentage of Mathematics teacher = 13%

After increased by 50% it becomes, 13 + 6.5 = 19.5%


Percentage of Hindi teacher = 8%

After increased by 25% it becomes, 8 – 2 = 6%

Now, percentage of total teachers becomes, 19.5 + 6 = 25.5%

Therefore, 25.5% of 1800

⇒   25.5  × 1800 = 25.5 × 18 = 459.

Hence, option C is correct. helps exam aspirants understand Data Interpretation (DI) sets on solving them with the help of relevant examples. This is the most important chapter of arithmetic section of Quantitative Aptitude. Here on this page, you will get to know about Pie Chart Data Interpretation questions with solutions for Bank Exams and SSC Exams, one of the important chapters of Quantitative Aptitude with all the short tricks of Data Interpretation question and answer, tricks to solve line chart, bar chart, mixed chart, information chart, radar chart, web chart, table chart, set theory  and pie chart. Less time taking approaches to solve Data Interpretation sets, tricks to solve data analysis questions and answers problems, Data Interpretation formulas, Important quantitative aptitude DI tricks video, pie chart Data Interpretation shortcuts, wherever applied.

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