Average age of 3 children born at intervals of 2 years is 8. How old is the eldest child?
-
A.
12 years
-
B.
7 years
-
C.
8 years
-
D.
10 years
Correct Answer:
D. 10 years
Explanation:
To find the age of the oldest child, we first determine the total age of all three children by multiplying the average age of 8 by 3, which equals 24. Let the age of the youngest child be represented by x. Since the children were born at two-year intervals, their ages can be expressed as x, x + 2, and x + 4. By adding these together (x + x + 2 + x + 4 = 24), we find that 3x + 6 = 24. Subtracting 6 from both sides gives 3x = 18, and dividing by 3 reveals the youngest child is 6 years old. To find the eldest child's age, we add 4 to the youngest child's age (6 + 4), resulting in 10 years.
Click below to open Discussion & Feedback
0 Issues
Please
login to comment or Report Issues.