Pie-chart shows the distribution of percentage of students in various courses. Total number of students is 1400.

613f3805a7887108d8dcbb4a Shubham Vaishnav Sanyukta Gaikar 13.09.21 D1

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.?

This question was previously asked in
SSC CGL 2020 Tier-I Official Paper 8 (Held On : 17 Aug 2021 Shift 2)
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  1. 7 : 2
  2. 3 : 5
  3. 2 : 7
  4. 5 : 3

Answer (Detailed Solution Below)

Option 2 : 3 : 5
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Detailed Solution

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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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