Ji-Kyung J.

# How do I calculate the probability that atleast one will be tails when two coins or more are tossed?

Lets say 0 Is Heads and 1 Is tails

If I toss a coin, there is 50% chances it lands on either side.
0
1

With two coins it means I could either have either
Option 1:

0 0
0 0
0 1
1 0
1 1
1 1

Or Option 2:

0 0
0 1
1 0
1 1

Option 1 of calculating it would mean my odds are 66.666666% chance to get at least one tails
Option 2 of calculating it would mean my odds are 75% chance to get at least one tails.

How do I calculate the probability that at least one will be tails when two coins or more are tossed?

And how to I calculate with elements that have 25% probabilities say two four 4 sided dice To know what is the odds to have atleast one, one

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