Answer:
19 is the third number.
Step-by-step explanation: To find the mean you need to add all of the numbers up then divide it by how many numbers there are. Since the mean is 10 and there are 3 numbers, I know that the numbers have to sum up to 30, and since 7+4=11 then I know to make the sum 30 I need 19 more. So the third number in your data set is 19.
Answer:
The Third number is 19
Step-by-step explanation:
7 + 2 = 11 then add 19=
11 + 19 = 30 After divide by three because there are 3 numbers
30.6 ÷ 3 = 10
Remember: To find the mean you add all the numbers together and divide by how many numbers are there.
For example: you have 2, 5, 8 you add them together which is 15. There are 3 numbers so you divide 15 by 3 which is 5.
