Pie-chart shows the distribution of percentage of students in various courses. Total number of students is 1400. Percentage-wise distribution of number of boys:
Course Number of boys B.Sc Maths 40% B.Sc Physics 68% B.Sc Chem 58% B.Sc Sci 80% B.Com 75% BBA 65%
What is the ratio of number girls in B.Sc. Maths to number of boys in B.Sc. Sci.?
3 : 5
Calculation:
Total number of students = 1400
Number of students in B. Sc Maths = (1400 × 20/100)
⇒ 280
Number of boys in B. Sc Maths = (280 × 40/100)
⇒ 112
Number of girls in B. Sc Maths = (280 – 112) = 168
Number of students in B. Sc. Sci = (1400 × 25/100)
⇒ 350
Number of boys in B. Sc. Sci = (350 × 80/100)
⇒ 280
The ratio of number of girls in B. Sc. Maths to number of boys in B. Sc. Sci = (168 : 280)
⇒ 3 : 5
∴ Required ratio is 3 : 5
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