Verified by Ajay Kumar
The average age of 20 students is 18 years. A group of 5 new students joins, increasing the average to 20 years. Find the average age of the 5 new students.
30
32
28
34
Answer: C
Original total age = 20 × 18 = 360 years. New total age = 25 × 20 = 500 years. Total age of the 5 new students = 500 − 360 = 140 years. Average = 140 ÷ 5 = 28 years.
20 छात्रों की औसत आयु 18 वर्ष है। 5 नए छात्रों का एक समूह शामिल होता है, जिससे औसत आयु 20 वर्ष हो जाती है। 5 नए छात्रों की औसत आयु ज्ञात कीजिए।
30
32
28
34
उत्तर: C
पहले कुल आयु = 20 × 18 = 360 वर्ष। नई कुल आयु = 25 × 20 = 500 वर्ष। 5 नए छात्रों की कुल आयु = 500 − 360 = 140 वर्ष। औसत आयु = 140 ÷ 5 = 28 वर्ष।
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