DOUBLE SIDED COIN 10p / DOUBLE HEADED COIN 10 Pence/HEADS ON BOTH SIDES

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Mucha, Ludvík; Louda, Jiří (1985). Crampton, William G. (ed.). Webster's Concise Encyclopedia of Flags & Coats of Arms. Crescent Books. ISBN 0517497808. Civic Heraldry, Wimbledon Borough Council". Archived from the original on 10 May 2015 . Retrieved 30 May 2015.

Appears in one episode of Only Fools and Horses; Grandad gave Del Boy a two-headed coin, which he tries to use to win bets with Boycie. Unfortunately, because he tosses, Boycie gets to call and keeps calling heads. In the end, after Del's beaten Boycie at poker, he offers Boycie double or nothing on the coin, but because Boycie thinks the law of averages means he's bound to lose this time, Del suggests that instead Rodney could call it, as Del's representative. So he spins the coin ... and Rodney calls tails. The coin features two distinct obverse designs, with the heads of both President Morgan and President Peace appearing on either side. The exact origins and purpose of this unique coin remain a mystery, adding to its allure and intrigue.Let event A be 'One of the 100 coins is Double head' and Event B be 'coin lands on head all 7 flips". In the Redwall book The Long Patrol the Rapscallions are an army/fleet of vermin whose leader, the Firstblade, wields a sword with one wavy and one straight edge. At the beginning of every campaign season, the Firstblade flips the sword in air, and whichever edge comes down first determines how they'll go raiding. Straight edge for marching overland, wavy for taking sail in search of plunder. This trope because the Firstblades also pass down a brass clip that fits to the hilt and crossguard unseen and weighs one end, so the Firstblade always chooses while pretending to leave things to fate. Used by Jai in Sholay when he and his brother need to make a difficult decision. Needless to say, he always gets his way. With all of these, I'm using naive probability, in which the numerator is my desired outcome(s) and the denominator my possible outcomes given the result. In this case, my desired outcome is double-headed, and my possible outcomes are double-headed or not double-headed and seven straight heads. This gives me My possible outcomes are the two above, and also there is no double-headed coin and this coin has come up heads seven times. This gives me:

Double-headed eagle on the main entrance gate of the Hermitage Museum in Saint Petersburg. ( CC BY SA 3.0 )The double-headed eagle has been a popular symbol associated with the concept of a powerful Empire. Most contemporary uses of the symbol are exclusively associated with its use by the Byzantine Empire and the Greek Orthodox Church. However, the double-headed eagle has been in use for thousands of years – way before the Greeks identify it with the Byzantine Empire and Orthodox religion – while its original meaning is debated among scholars. Early Origins In Batman Forever Two-Face has his double-headed coin with one side scarred, like usual. It's a Double Subversion, though, as instead of always doing what the coin says, he keeps flipping the coin until he gets the outcome he wants. He actually seems to toss it every time he has a clear shot at Bruce, keeping it perfectly in-character for Two-Face.