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Comprehension

The table graphs shows the number of boys and girls study in five different schools [ A, B, C, D and E].

 

School

Number of Boys

Number of girls

A

420

400

B

380

200

C

320

400

D

580

500

E

350

450

 

Ratio of number of boys and girls in school C is x:y. Find the value of x + y ? [ratio is lowest possible integer]

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  1. 3
  2. 9
  3. 7
  4. 6
  5. 5

Answer (Detailed Solution Below)

Option 2 : 9
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Detailed Solution

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Calculation

Boys : Girls in C = 320 : 400

Simplify the ratio:

320 : 400 = 4 : 5

Thus, x = 4 and y = 5

[x + y] = [4 + 5] =9

Answer: 9

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