Simulation game base on Percentage using random numbers

Hi! I'm new to this forum so pls be gentle :)

I'm making a simulation game that based on % chances. So what i'm wondering is what follows:

1. Is choose(1,2) the same with floor(random(1,3))? - what im trying to accomplish here is there's a 50% chance of pick 1 or 2.

2. How about balance/fair chances, does this two conditioning the same 50%:

Variable: Percentage

floor(random(1,3))

if Percentage is 1, then shoot

if Percentage is 2, then miss

floor(random(1,11))

if Percentage is <= 5, then shoot

if Percentage is >= 6, then miss

Thank you in advance! :D

random(2) is a number from 0 to 1.99999999999

random(1,3) is a number from 1 to 2.9999999999

So yes, floor(random(1,3)) is the same as choose(1,2), and represents 50-50 chance.

Alright, thank you dop2000 !