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HCL Tech Hiring Counting — practice questions

Explore 1 free Counting questions in HCL Tech Hiring Quantitative Aptitude. Open each question or exercise to read its content, reference answers and available explanation.

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In a group of 100 students, every student studies 8 subjects and every subject is studied by 10 students. The number of subjects is:Read the answer and worked solution →

Worked practice questions

In a group of 100 students, every student studies 8 subjects and every subject is studied by 10 students. The number of subjects is:

  1. Exactly 50
  2. Exactly 30
  3. Exactly 90
  4. Exactly 80
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Correct answer: D. Exactly 80

1. Total student-subject pairings = 100 students x 8 subjects = 800. 2. Each subject is taken by 10 students, so subjects = 800 / 10. 3. Number of subjects = 80. _Source: RRB Group D CEN-02/2018 PYQ, Q.51._

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