Here we have given the General Rules to Solve Average Problems. Candidates those who are applied for the various Competitive examinations can use this material.
An average or more accurately an arithmetic mean can be defines as the sum of n different data divided by n.
Averages of a group is defined as the ratio of sum of all the items in the group to the number of items in the group.
Average = (Sum of all items in the group)/ Number of items in the group
Now, sum of all items can be ‘the sum of number of quantities like apple, people etc’ or ‘sum of values of the item like 10 coins of 5 Rs each etc’.
Find the Average Speed
When a person leaves the group and another person joins the group in place of that person then-
When a person joins the group-
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