SSC GD Constable previous year question
Average age of a group of 27 boys is 21 years. If a boy leaves the group, then the average age becomes 21.7 years. What is the age of the boy who left the group?
Asked in SSC GD Constable 2024: 26 Feb 2024 Shift 3 · Quantitative Aptitude
Tap an option to check your answer.
Show answer and explanation
Correct answer: (A) 2.8 years
Total of 27 = 567. Remaining 26 total = 564.2. The boy who left weighed 567−564.2 = 2.8 years... (age, not weight): 2.8 years.
हिंदी में प्रश्न
27 लड़कों के एक समूह की औसत आयु 21 वर्ष है। यदि कोई लड़का उस समूह को छोड़ देता है, तो औसत आयु 21.7 वर्ष हो जाती है। समूह छोड़ने वाले लड़के की आयु कितनी है?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (A) 3.4 वर्ष
Total of 27 = 567. Remaining 26 total = 564.2. The boy who left weighed 567−564.2 = 2.8 years... (age, not weight): 2.8 years.
More solved Quantitative Aptitude questions
- What is the value of [0.25 × (0.25 ÷ 0.25)] / [(0.25 × 0.25) × 0.25]?
- Two trains are moving in the same direction at the speed of 34 km/hr and 86 km/hr, their lengths are 300 metres and 480 metres…
- In an exam, Sandeep got 55 percent less marks than the passing marks. He got 223.2 marks. If the passing percentage is 62 percent, then…
- Sneha alone can complete a work in 30 days and Anju alone can complete the same work in 45 days. Anju alone worked for the first 15 days…
- What is the value of 143 × 13 ÷ 11 + 156 ÷ 13 × 12 - 210 × 15 ÷ 14?
- Rs. 20000 is lent at compound interest at an annual rate of 18 percent for 1 year (compounding annually). If the compounding of interest…