One way to generate random numbers without replacement:

Enter the Rand function in an out-of-the-way location of your sheet,

=Rand()

And copy down,
say Z1 to Z1000.

Then enter this formula anywhe

=INDEX(ROW($A$1:$A$1000),RANK(Z1,$Z$1:$Z$1000))

And copy down as many rows as the amount of numbers you need.

Each time you hit <F9, you'll get a new random list.
--
HTH,

RD

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"Gaurav" wrote in message
...
Sorry. I will use =RANDBETWEEN(1,1000) in 30 cells


"Gaurav" wrote in message
...
Hi All,

If I use RANDBETWEEN function to generate random samples, how do I make
sure that units are not repeate?

For example-

I have 1000 units and I have to generate 30 samples. I will use
RANDBETWEEN(1,30) in 30 cells. How do I make sure that the numbers are
not repeated and all the samples are unique?

Thanks in advance for any help.