azsalazar
azsalazar azsalazar
  • 22-03-2022
  • Mathematics
contestada

You randomly pull two bills, what is the probability that they are both $20?

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CoastsideDad
CoastsideDad CoastsideDad
  • 22-03-2022

Answer:

Depends on the pool you are pulling them from.

There are currently 11 different denomination accessible.

That would be 1 out of 11.

But considering that 4 of those bills are uncommon, the odds become 1 out of 7

Then to pull 2 of the same would mean you multiply 1/11 by 1/11 = 1/121

for the 1/7 it would become 1/49

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