Correct Answer : (A) 6 km
Average age of A, B and C is 84 years. When D joins them, the average age becomes 80 years. A new person, E, whose age is 4 years more than D, replaces A and the average of B, C, D and E becomes 78 years. What is the age of A?
Correct Answer : (A) 80 years
20% raise of price followed by a discount of 25% of the raised portion will
Correct Answer : (A) increase the price by 15%