If mean of number is 4.5... what is the sum of numbers...?

Question

anonymous · Answer

The mean of a set of numbers is equal to:
$$\frac{Sum.of.numbers}{\#.of.numbers}$$

anonymous · Answer

The sum will be equal to the number of values times the mean.

johnweldon1993 · Answer

Right..so if it tells you how many numbers were added to make said "mean" ...you need only multiply the mean times the amount of numbers

anonymous · Answer

please solve here

anonymous · Answer

@ johnweldon.... i did this simple step, but i think its wrong.... 4.5*1=4.5 sum of numbers...

anonymous · Answer

How many numbers, or sets of data is being used to calculate the mean. You can't find the sum without that.

anonymous · Answer

@ heril... yeah dear... in question i have only the mean of the number.... and need the sum... please help...

anonymous · Answer

Without the information of the size of the set, survey, group, whatever you are trying to find the mean of, you cannot find the sum of the set from the mean. Is there any additional information in the instructions?

johnweldon1993 · Answer

Right @engrbill can you type the whole question please? Or is that everything?

anonymous · Answer

no

anonymous · Answer

that is the full question...

johnweldon1993 · Answer

If that is the full question...we can have multiple answers...

$$\large \frac{1 + 7 + 2 + 8}{4} = 4.5$$ That sum would be 18...

But we could also have

$$\large \frac{1 + 2 + 3 + 5 + 7 + 9}{6} = 4.5$$ and that sum would be 27

So it is impossible to say...we do not know how many numbers you are given to calculate that mean...and therefor we will have an endless amount of answers.

anonymous · Answer

ok, bundle of thanks