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  • Question
  • The average of class in 35 yr. 6 new students with an average age of 33 yr. joined in that class, there by decreasing the average by half year. The original strength of the class was


  • Options
  • A. 14
  • B. 18
  • C. 16
  • D. 20

  • Correct Answer
  • 18 

    Explanation

    Let the number of students in the class = N
    According to the question,
    (35N + 6 x 33) / (N + 6) = 35 - (1/2)
    ? 35N + 198 = 34.5 (N + 6)
    ? 35N +198 = 34.5N + 207
    ? 0.5N = 207 -198N = 9/0.5 = 18
    ? N = 18 days

  • Tags: Bank Exams

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      Find the cube root of 19683.

    • Options
    • A. 25
    • B. 26
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    • Options
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