21 movoe photo

21

"They proved the Vegas Blackjack System was beatable...by beating the hell out of it."

Ben Campbell is a young, highly intelligent, student at M.I.T. in Boston who strives to succeed. Wanting a scholarship to transfer to Harvard School of Medicine with the desire to become a doctor, Ben learns that he cannot afford the $300,000 for the four to five years of schooling as he comes from a poor, working-class background. But one evening, Ben is introduced by his unorthodox math professor ...

-- Box Office --
Released: Mar 7th, 2008
Budget: $35,000,000.00
Revenue: $69,823,199.00

21 Main Cast

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Jim Sturgess
Jim Sturgess
plays Ben
Kevin Spacey
Kevin Spacey
plays Micky Rosa
Kate Bosworth
Kate Bosworth
plays Jill
Aaron Yoo
Aaron Yoo
plays Choi
Liza Lapira
Liza Lapira
plays Kianna
[More Cast]

Movie Trivia/Goofs

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  • Movie Goof (incorrectly regarded as a mistake): "In the prize behind three doors game, the strategy of switching doors actually gives your overall odds to win of 50%, not 66%. Say the doors are A, B and C and the prize was behind B. There are four outcomes using the strategy: 1.You choose door A. Door C opens and you switch to door B, and win 2.You choose door C. Door A opens and you switch to door B, and win 3.You choose door B. Door A opens and you switch to door C, and lose 4.You choose door B. Door C opens and you switch to door A, and lose There are two scenarios that you win and two in which you lose. The probability of winning is 2/4 or 50%. Note that #4 is actually different than #3 and is disregarded by the movie, giving the 66% odds. Similar scenarios work if the prize was behind door A or C." This theory is actually incorrect. This scenario is referred to as the "Monty Hall Problem" and it's solution is a counterintuitive, making the problem a veridical paradox. Many explanations exist, but the easiest is this. If I initially chose door A for the car, I have a 1/3 chance of winning the car. The game show host, knowing the location of the car will open a door with a goat. Once a "goat door" is open, my original probability of 1/3 still exists, as I chose when 3 choices were present. Since the chance of the car being behind the opened "goat door" is zero, the remaining door has a 2/3 chance of having the car as the total probability of choices must equal 1, or 3/3. Therefore, you double your odds of getting the car by switching you choice.
  • The "2.0.9" robotics competition shown in the movie is based on the actual "6.270" programming competition at M.I.T.
  • Movie Goof (continuity error): When Mickey and Ben are walking through the park before the first trip, there is no one behind them. The camera changes and there is a woman walking her dog and another man.
  • Movie Goof (continuity error): When Ben meets with Mickey and the group for the first time, he explains the basic rules of 21 and deals himself a face-up card, then the camera cuts to Ben then back to Mickey and now Mickey's card is face down.
View All: Trivia - Goofs - Quotes


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