The average age of 30 boys in a class in 15 years. One boy, aged 20 years, left

Sail E0 Webinar

Question

The average age of 30 boys in a class in 15 years. One boy, aged 20 years, left the class, but two new boys came in his place whose age differs by 5 years. If the average age of all the boys now in the class becomes 15 years, the age of the younger newcomer is :

Options:

A . 20 years

B . 15 years

C . 10 years

D . 8 years

Answer: Option B

Submit Your Solution Below and Earn Points !

Next Question

Submit Solution

More Questions on This Topic :

Question 1. The average of 8 numbers is 20. The average of first two numbers is $$15\frac{1}{2}$$ and that of the next three is $$21....4 and 7 respectively, them the eighth number is :

Question 2. The average age of a class of 39 students is 15 years. If the age of the teacher is included, then the average increases....increases by 3 months. Find the age of the teacher.

Question 3. The mean of 9 observation is 16. One more observation is included and the new mean becomes 17. The 10th observation is :....the new mean becomes 17. The 10th observation is :

Question 4. The average weight of first 11 persons among 12 persons is 95 kg. The weight of 12th person is 33 kg more than the avera....12 persons. The weight of the 12th person is :

Question 5. In the afternoon, a student read 100 pages at the rate of 60 pages per hour. In the evening, when she was tired, she rea....her average rate of reading the pages per hours ?

Question 6. If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55 and 60, then the average marks of....then the average marks of all the students is :

Question 7. Find the average of cubes of first 49 positive integers.....

Question 8. In a family of 5 members, the average age at present is 33 years. The youngest member is 9 years old. The average age of....just before the birth of the youngest members was :

Question 9. A man spends his three months income in four month time. If his monthly income is Rs. 1000 then his annual savings is ?....income is Rs. 1000 then his annual savings is ?

Question 10. Average weight of 25 persons is increased by 1 kg when one person weighing 60 kg is replaced by a new person. Weight of ....by a new person. Weight of new the person is-

Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)

Direction Sense Test Part 1 Reasoning (Hindi)

Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE

Cube & Cuboid Part 1 Reasoning (Hindi)

Data Interpretation (DI) Basic Concept Reasoning (Hindi)

Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)

Sail E0 free webinar Webinars

Real Numbers Part 7 Class 10 Maths

Real Numbers Part 1 Class 10 Maths

Polynomials Part 1 Class 10 Maths

Pie Chart - Test Paper 1 Data Interpretation Reasoning & DI

Tabulation - Test Paper 2 Data Interpretation Reasoning & DI

Test Paper 1 Direction Sense Test Reasoning & DI

ICA , RDIC,GFM Free Modal Test Paper - Non - Technical Branch Old Syllabus 2022 - SAIL Junior Officer E0

GFM Combined 1 Free Revision Test SAIL JO E-0