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Message:: [QUOTE="Hobo, post: 340848, member: 11521"]Here is a simple lesson in statistics. Flip 2 coins. (These coins represent the coin faces showing at the ends of a roll.) Record the results (e.g., heads + heads, tails + tails and heads + tails). Repeat as many times as you wish. The more repetitions the better the results. If you do the test enough times you should see results something like: heads + heads = 25% tails + tails = 25% heads + tails = 50% What this tells you is that the way the coins face is completely random. This is also true for how the end coins face in a roll. Half the time the coin at one end has its obverse visible; half the time its reverse is visible. Half the time the coin at the other end has its obverse visible; half the time its reverse is visible. The combinations are also completely random and the odds of each combination are equal:  obverse + obverse = 25% reverse + reverse = 25% obverse + reverse = 25% reverse + obverse = 25% (obverse + reverse and reverse + obverse are really the same thing so the odds of having opposite faces showing on the ends of a roll are 25% + 25% or 50%) Hope this helps.[/QUOTE]