In a class of 140 students, the ratio of the number of boys to that of girls is 3 : 4. The ratio of the number of students who passed in a test to those who failed is 3 : 2. Among the boys, the ratio of the number of those who passed to those who failed is 1 : 2. What is the ratio of the number of girls who passed to those who failed?

3 : 1
4 : 1
3 : 2
3 : 4

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 2 : 4 : 1

Given:

In a class of 140 students,

Calculation:

⇒ The number of boys in class = (3/7) × 140 = 60

⇒ The number of girl in class = (4/7) × 140 = 80

⇒ The number of boy who passed = (1/3) × 60 = 20

⇒ The number of boy who failed = (2/3) × 60 = 40

⇒ The number of student who passed = (3/5) × 140 = 84

⇒ The number of student who failed = (2/5) × 140 = 56

⇒ The number of girl who passed = 84 - 20 = 64

⇒ The number of girls who failed = 56 - 40 = 16

⇒ The required ratio = 64/16 = 4/1

∴ The required result will be 4 : 1.

4 views Answered 2022-09-04 04:29

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