Q. The average age of four boys A, B, C and D is 5 years and the average age of A, B, D, E is 6 years. C is 8 years old. The age of E is (in years)
✅ Correct Answer: (A)
12
Explanation: Given that , The average age of A, B, D, E = 6 years.
Age of C = 8 years
The average age of four boys A, B, C and D = 5 years
⇒ A + B + C + D = 20 years
⇒ A + B + D = 20 – 8 = 12 years
∴ The average age of A, B, D, E = 6 years.
Now, A + B + D + E = 24 years
∴ E = 24 – 12 = 12 years
Explanation by: Vaibhav Shukla
Given that , The average age of A, B, D, E = 6 years.
Age of C = 8 years
The average age of four boys A, B, C and D = 5 years
⇒ A + B + C + D = 20 years
⇒ A + B + D = 20 – 8 = 12 years
∴ The average age of A, B, D, E = 6 years.
Now, A + B + D + E = 24 years
∴ E = 24 – 12 = 12 years
Age of C = 8 years
The average age of four boys A, B, C and D = 5 years
⇒ A + B + C + D = 20 years
⇒ A + B + D = 20 – 8 = 12 years
∴ The average age of A, B, D, E = 6 years.
Now, A + B + D + E = 24 years
∴ E = 24 – 12 = 12 years