A dollar and a dream
A woman plays a slot machine at the Sahara Casino in Las Vegas. Slot machines have three "reels" that spin when a button is pushed. The machines are also known as "one-armed bandits" because they were originally operated by a lever on the side (the "one arm") and because they often left the players penniless.
The original slot machine with 10 symbols on each of three reels had 103 or 1,000 possible combinations. Today's high-tech machines use computer chips and can offer as many as 2563 or 16,777,216 combinations. So a casino might offer a million-dollar jackpot on a $1 bet, confident that someone will win, on average, once only every 16.8 million plays.
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