+1306 A coin is tossed 10 times. How many different sequences of tosses could there have been, if at least 8 of the tosses were heads?
+34 @Guest, I'm getting something different hopefully you can help me with the problem I'm having here:
Say our coins were in the form of:
_ _ _ _ _ _ _ _ _ _
Where each "_" is either a head or a tail. We need 8 of the tosses to be heads, so we do:
choose 8 of 10
This is 45, then for the other two, we have 2 * 2 = 4 options for what those can be, so I'm getting
45 * 4 = 180
So that's my answer (but it's probably incorrect, and if it is, please tell me so I can fix it!)
