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Study the given pie - chart and table carefully and answer the question that follows. The percentage wise distribution of lecturers in five different subjects in a university is shown in the pie chart. The total number of lecturers is 500. Ratio of male to female lecturers: Lecturers Males : Females Mathematics 7 : 3 Physics 2 : 3 Chemistry 4 : 1 Botany 3 : 5 Zoology 2 : 5   What is the difference in the number of female lecturers in chemistry and Mathematics?

Study the given pie - chart and table carefully and answer the question that follows. The percentage wise distribution of lecturers in five different subjects in a university is shown in the pie chart. The total number of lecturers is 500. Ratio of male to female lecturers: Lecturers Males : Females Mathematics 7 : 3 Physics 2 : 3 Chemistry 4 : 1 Botany 3 : 5 Zoology 2 : 5   What is the difference in the number of female lecturers in chemistry and Mathematics? Correct Answer 25

Given :

Total number of lecturers are 500 

Calculations :

Lecturers in Chemistry = 20% of 500 

⇒ 100 

Female lecturers in Chemistry = (1/5) of 100   (Ratio of male to female is 4 : 1)

⇒ 20 

Lecturers in mathematics = 30% of 500 

⇒ 150 

Female lecturers in mathematics = (3/10) of 150    (Ratio of male to female is 7 : 3)

⇒ 45 

Difference of female lecturers of Chemistry and Mathematics = 45 - 20 

⇒ 25 

∴ The correct answer will be option 4.

 

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