SSC CHSL 15 Nov S3 – Q042

Question:

The average age of 5 students is 16 years. If one student of age 21 years joins, what is the new average?

5 छात्रों की औसत आयु 16 वर्ष है। यदि 21 वर्ष का एक छात्र शामिल होता है, तो नया औसत क्या होगा?

Options:

  • 16.5
  • 17
  • 17.5
  • 18
  • 16.5
  • 17
  • 17.5
  • 18

Correct Answer: b)

Explanation:

Initial total age = \(5 \times 16 = 80\) years.
With new student: \(80 + 21 = 101\) years for 6 students.
Average = \(101 / 6 \approx 16.83 \approx 17\) years.

5 छात्रों की कुल आयु = \(5 \times 16 = 80\) वर्ष।
नए छात्र सहित कुल आयु = \(80 + 21 = 101\) वर्ष (6 छात्र)।
नया औसत = \(101 / 6 \approx 17\) वर्ष।

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