I host bingo events for charities as a volunteer and I would like to use an electronic version of the number generator.
Is there a formula where you press a key and a random number between 1 and 90 (inclusive) appears and there are no duplicates?
Secondly is it possible to show the chosen numbers in a 10 by 9 matrix? The second part to my request will be a bonus and not a necessity.
Thank you.
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