TIPS FOR SOLVING QUESTIONS RELATED TO AVERAGE:
1. The average of a number of quantities of the same kind is equal to their sum divided by the number of those
Average = Sum of the quantities
Number of quantities
Also, Sum of the quantities = Average x Number of quantities.
2. If a man covers a certain distance at x km/h and an equal distance at y km/h.
Then, the average speed during the whole journey is given by
x + y