Wednesday

April 16, 2014

April 16, 2014

Posted by **Julia Ten** on Thursday, July 23, 2009 at 7:40pm.

so i started like this...

x/20= 32

my answer is 640. is this correct?

- math -
**Reiny**, Thursday, July 23, 2009 at 8:03pmno

think backwards, and how "average" is obtained

the average of 20 numbers was 32, so the total of all the numbers must have been 20x32 or 640.

For 21 numbers the average was now 34, so the total must have been 21x34 or 714

so 714-640 or 74 must have been the number added

**Related Questions**

math - the mean of a list of seven numbers is 45. if i add two numbers to this ...

Statistics - A list of numbers has an average of 48 and an SD of 12. The list is...

Math - In the list of numbers 1,2,3,4,5,6,7,8,9, how many of the numbers in the ...

math - average of 6 numbers is 19.A seventh number is added and the new average ...

math - the difference between two numbers is 5 the average of the number is 11 ...

math - the average of 2 number is 9. list all possible of numbers that will work

Discrete Mathematics - Use Bubble Sort to sort the list: 7, 12, 5, 22, 13, 32 ...

5th grade math - A list of numbers represents the following pattern: For each ...

math - Does anyone know how to explain mean, median, mode and range mean?? mean-...

5th grade math - A list of numbers represents the following pattern: For each ...