2010 · Q7
(For the next two questions to follow):
The average age of 06 persons living in a house is 23.5 years. Three of them are majors and their average age is 42 years. The difference in ages of the three minor children is same.
What is the mean of the ages of minor children ?
Elementary MathematicsStatistics
- A3 years
- B4 years
- C5 years
- D6 years
Explanation
Total age 141, majors 126, minors 15; mean = 5 years.