00:01
For this problem to begin, let's consider our two different events.
00:04
Let's say event a is the event that at least two heads appear.
00:08
So that would be heads, heads, heads, heads, tails, heads, tails, tails, tails, tails, or heads, heads, and we know that event b, or the other event, is the event that the first coin landed on heads.
00:28
So we'd have heads, heads, heads, tails, heads, heads, heads, heads, heads, heads, and heads...