Question

The mean of three numbers is 5.The mean of other four numbers is 12. Find the mean of all the numbers

Answer 1

Answer:

Explanation:

The mean of a set of numbers is the sum of the numbers over the count of the set (the number of values).

We have a set of four numbers and the mean is 5. We can see that the sum of the values is 20:

20

4

=

5

We have another set of three numbers whose mean is 12. We can write that as:

36

3

=

12

To find the mean of the seven numbers together, we can add the values together and divide by 7:

20

+

36

7

=

56

7

=

8

Step-by-step explanation:

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