The average age of three boys is 15 years and their ages are in proportion 3:5:7. the age in years of the youngest boys is----------?
Answer: 9
Explanation
The age of the three boys are =3 x, 5 x, and 7 x
3 x + 5 x + 7 x / 3 =15
15 x / 3 =15
x = 3
youngest Boy =3 × 3= 9 years
**
ND22-1-2023
This question appeared in
Past Papers (1 times)
IBA STS Past Papers, Syllabus, Jobs (1 times)
This question appeared in
Subjects (1 times)
MATHS MCQS (1 times)
Related MCQs
- The average age of group of 13 boys is 13. When two boys are joined group. The average rose by 2 years the sum of ages to 2 new boys is?
- The average age of three boys is 15 years. if their age are in ration 3:5:7, the age of the youngest boy is:
- The sum of ages of 5 children born at the intervals of 3 years each is 50 years. What is the age of the youngest child?
- The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg. Find the average weights of all the boys in the class.
- Rimsha is 6 years older than her younger sister. After ten years, the sum of their ages will be 50 years. Find their present ages.
- Najma is 6 years older than her younger sister. After 10 years, the sum of their ages will be 50 years. How do you find their present ages?
- Ages of the two persons differ by 16 years. If 6 years ago, the elder one be 3 times as old as the younger one, find their present ages.
- Recommended intake of vitamins for 13-15 years boys is ______?
- Sarah is twice as old as her youngest brother. If the difference between their ages is 15 years. How old is her youngest brother?
- Ali is twice as old as his youngest brother. If the difference between their ages is 15 years. How old is his youngest brother?
