The average age of three boys is 15 years and their ages are in proportion 3:5:

Question

The average age of three boys is 15 years and their ages are in proportion 3:5:7. What is the age in years of the youngest boy?

Options:

A . 15

B . 9

C . 18

D . 21

Answer: Option B

3x + 5x + 7x = 45

x
=3

3x = 9

Was this answer helpful ?

Next Question

Submit Comment/FeedBack

More Questions on This Topic :

Question 1. The average of 1st 3 of 4 numbers is 16 and of the last 3 are 15. If the sum of the first and the last number is 13. Wh....the last number is 13. What is the last numbers?

Question 2. The average of 10 numbers is calculated as 15. It is discovered later on that while calculating the average, one number....36 was wrongly read as 26. The correct average is?

Question 3. The average of 9 observations was 9, that of the 1st of 5 being 10 and that of the last 5 being 8. What was the 5th obs....the last 5 being 8. What was the 5th observation?

Question 4. The average age of a husband and a wife is 23 years when they were married five years ago but now the average age of th....the interval). What is the present age of the child?

Question 5. A batsman in his 17th innings makes a score of 85 and their by increasing his average by 3. What is his average after t....average by 3. What is his average after the 17thinnings?

Question 6. In a hostel there were 100 students. To accommodate 20 more students the average is decreased by rupees 5. But total ex....by Rs.400. Find the total expenditure of the hostel now?

Question 7. Visitors to show were charged Rs.15 each on the first day. Rs.7.50 on the second day, Rs.2.50 on the third day and tota....The average charge per person for the whole show is?

Question 8. A building contractor employs 20 male, 15 female and 5 child workers. To a male worker he pays Rs.25 per day, to a fema....The average wage per day paid by the contractor is?

Question 9. Find the average of the first 20 natural numbers? ....

Question 10. A batsman makes a score of 64 runs in the 16th innings and thus increased his average by 3. Find his average after the ....average by 3. Find his average after the 16th inning?

Latest Videos

Chapter 1 - GLOBAL STEEL SCENARIO & INDI 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

Latest Test Papers

Chapter 3.1 : Overview of Finance & Acco Chapter 3 : Finance & Accounts SAIL E0 - GFM 2024

Chapter 2.1 : Overview Chapter 2 : Materials Management SAIL E0 - GFM 2024

Chapter 1.1 : Personnel Functions- An ov Chapter 1 : Personnel Management SAIL E0 - GFM 2024

GPOE / GPA Combined 1 Free CBT Mock Test SAIL E0 2024

CBT Mixed Test 1 GPOE/GPA SAIL E0 2024

Menu

Popular Courses

Search

Submit Comment/FeedBack

More Questions on This Topic :

Latest Videos

Latest Test Papers