How can I randomly select one variable between 3 variables?

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I want to randomly select 1 variable between variables 10, 20, and 30.
This is what I did and it failed.
a = [10:10:30]
rand(a)
It gives me numerous floats. I want to get 10 or 20 or 30.
Thank you for your help.

Accepted Answer

Fangjun Jiang
Fangjun Jiang on 28 Feb 2022
a = [10:10:30]
a(randi(3,1))

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