Formula for random numbers with given numbers

Hi,

I wonder if i can pick random numbers from specific numbers.

Say, I would like to pick 3 of any numbers from following numbers (1, 3, 19, 29, 100, 210, 1000).

Please advise if there is any way to do this.

Thanks
MK

Where would these numbers appear? In separate cells or all in one cell?

Do you want to allow repeats? Something like =INDEX($A$1:$A$7,RANDBETWEEN(1,7)) will randomly choose one number from the list entered in A1:A7. 3 copies of that function will randomly choose three numbers, with the possibility of repeats.

Do you want the selections to be unique? I like to think of that as a "shuffle/sort" operation that usually looks something like entering the numbers into A1:A7, entering random unique numbers in B1:B7 (RAND() function), sorting the list by column B, then reading from the top of column A.

What kind of random selection are you trying to accomplish here?

One way to produce unique values (non-repeating):

=INDEX(A:A,AGGREGATE(15,6,ROW($A$1:$A$7)/NOT(COUNTIF($C$1:C1, INDEX(A:A,ROW($A$1:$A$7)))), RANDBETWEEN(1,8-ROW(C1))))

The bit in red is the number of values in your choice... plus 1.

You seem to be using an older version of Excel than me. So, please refer to the attached file. If the formulae are enclosed within a pair of { }, these are array formulae.

These are a little different from ordinary formulae in that they MUST be confirmed in the FIRST CELL ONLY by pressing CTRL+SHIFT+ENTER to activate the array, not just ENTER. After that, the array can be dragged down as normal, to cover the desired range.

You will know the array is active when you see the curly brackets { } appear around the outside of your formula. If you do not use CTRL+SHIFT+ENTER you will (almost always) get an error message or an incorrect answer. Press F2 on that cell and try again.

Don't type the curly brackets yourself - it won't work...

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