A) 1

B) 3

D) 7

**Related MCQs:**

- The average age of A, B, C, D, and E is 40 years. The average age of A and B is 35 years and the average of C and D is 42 years. Age of E is?
- Average age of A and B is 30 years, that of B and C is 32 years and the average age of C and A is 34 years. The age of C is?
- Five years ago the average age of p and Q was 15 years. Average age of P,Q and R today is 20 years. How did will R be after 10 years?
- In 2002, Amnesty International succeeded in having an “Optional Protocol” added to the Child Human Rights Act in the UN. This protocol raised the age at which states can legally recruit children into the armed forces to 18. What was the legal age under that treaty before?