1. Mean – statement problems

2. The average or arithmetic mean or mean is defined as follows.
∴ Sum of all observation = Mean x Total number of observation

3. Example1: Find the mean of first 5 even numbers
Solution
The first 5 even numbers are 2 , 4 , 6 , 8 , 10
Sum of 5 even numbers = = 30
Ans: Mean of first 5 even numbers is 6

4. Example2: The weight and mean of some people is 656 kg and 82 kg.
What is the total number of people.
Solution Given : Mean = 82 , Total weight= 656
To Find: Total number of people
Ans:- Total number of people is 8

5. Example3: The mean price of 5 pens is Rs 75
Example3: The mean price of 5 pens is Rs 75.What is the total cost of 5 pens
Solution Given : Mean = 75 , Total number of pens = 5
To Find: Total cost of 5 pens
We know that
Sum of all observation = Mean x Total number of observation
Total cost of pens = Mean x Total pens
= x 5
= 375
Ans:- Total cost of 5 pens is Rs 375

6. Try these
The mean weight of 10 boys in a cricket team is 65.5 kg. What is the total weight of 10 boys.