Question
The average age of three children is 21 years. If their
ages are in the ratio 3:5:6. Find the age of the youngest child.Solution
Total age of three children = 21 × 3 = 63 years Let their ages be 3x, 5x and 6x respectively. => 3x + 5x + 6x = 63 => 14x = 63 => x = 4.5 Therefore the age of youngest child = 3 × 4.5 = 13.5 years
More Average Questions
What is the greatest common divisor of 1320, 1980, and 3300?
- A number gives a remainder of 14 when divided by 29. What will be the remainder when six times that number is divided by 29?
Find the sum of all two-digit numbers that are exactly divisible by 4.
What is the ratio of the sum of the squares of the first 8 natural numbers to the sum of the first 12 odd natural numbers?
What is the remainder when 7⁴ is divided by 10?
Which of the following is a prime number?
- A fraction 'k' is such that when it is subtracted from (6/7), the result is (2/5). What will be the remainder when the denominator of 'k' is divided by its...
Sum of two digits of a two digit number is 11. When digits of the number are reversed then number formed is 45 more than the original number. Find the ...
- A two-digit number '9f' is completely divisible by '4'. When the same number is divided by '3', there is a remainder of '2'. Find the value of 'f'.
Relevant for Exams:
