.. How do I generate the 75 unique solutions
so that no duplicates appear in the first place?

One play to try ..

Sample construct available at:
http://www.savefile.com/files/3005009
FilterUniqueRandom_THarris_wks.xls

Put in

A1:
=INDEX(B:B,RANK(D1,$D$1:$D$75))&INDEX(C:C,RANK(D1, $D$1:$D$75))

B1:
=VLOOKUP(INT((ROW(A1)-1)/15)+1,{1,"B";2,"I";3,"N";4,"G";5,"O"},2,0)

C1: =ROW(A1)
D1: =RAND()

Select A1:D1, copy down to D75

A1:A75 will return a unique random shuffle of all the 75 alpha-numbers
(B1 - O75). Pressing F9 will regenerate a fresh shuffle.

You might also be interested in this "Bingo Board" program file
which was put together (based on code from Tom Ogilvy)
and posted a few months back:

Link: http://savefile.com/files/5028169
Bingo_Board_v2_Random_Draw_without_Replacement.xls
(Its easy and fun to use !)

--
Rgds
Max
xl 97
---
Singapore, GMT+8
xdemechanik
http://savefile.com/projects/236895
--
"T Harris" wrote in message
...
Using 75 cells down begining with A1 and B1, I have random number between
1-75 in B column and corresponding letters of the word BINGO to appear
accordingly in the A column. Thanks to three people in this forum, this
is
working. Now when I hit F9, the BINGO results are displayed in the first
75 rows of the A and B columns.

Now, how do I filter the 75 results to weed out duplicates like "B12"?
(OR
another solution which may be the best is) How do I generate the 75 unique
solutions so that no duplicates appear in the first place? If anyone has
an
answer to either question, I would appreciate it very much. I tried
ADVANCED FILTER and could not get it to work and output my unique results
to
another location. Thanks.

T Harris