Comprehension

The bar graph shows the total number of students [ boys and girls] and total number of girls in five different [ A, B, C, D and E] schools.

 

Ratio of number of students use school bus and number of students who do not use school bus in school A is 5:3. Out of total number of students 50% are who use school bus are girls. Find number of boys who do not use school bus from school A?

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  1. 60
  2. 50
  3. 70
  4. 55
  5. 40

Answer (Detailed Solution Below)

Option 5 : 40
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Detailed Solution

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Common Calculation

School

Total number of students [ Boys + Girls]

Total number of girls

The number of boys

A

320

180

320 – 180 = 140

B

280

160

120

C

360

200

160

D

380

210

170

E

420

200

220

 

Calculation

Ratio of students using school bus to those not using it = 5:3

Total students in School A = 320

So, let students using school bus = [5/8] × 320 = 200

Those not using school bus = 320 – 200 = 120

Out of those who use the school bus, 50% are girls

⇒ girls = [50 / 100] ×200=100

So, boys who use the bus = 100

Total boys in A = 140

So, boys not using the bus = 140 – 100 = 40

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