Comprehension

Direction: There are 1250 total students in 5 different classes in a school. The number of students in class I is 50 less than the number of students in class II. The number of class IV students is 50 more than the number of students in class II. The average number of students in class III and class V is 250. The number of students in class III is 10% less than the number of students in class I.

The number of students of class I is -

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RRB Officer Scale-I (4 August 2019) Prelims Memory Based Paper
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  1. 50
  2. 100
  3. 250
  4. 150
  5. 200

Answer (Detailed Solution Below)

Option 5 : 200
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Detailed Solution

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Given,

Total number of students of five different class = 1250

Let the number of students of class I be M.

Number of students of class II = M + 50

Number of students of class IV = M + 50 + 50 = M + 100

Total number of students of class III and class V = 250 × 2 = 500

Then,

⇒ 1250 = M + M + 50 + M + 100 + 500

⇒ M = 200

∴ The number of students in class I is 200.
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