coin

  1. G

    Coin probability problem

    We throw the coin 1 000 000 times. How many times on average will make 13 successful heads? Now the problem with the naive: 1 000 000/(2^13) is that once it made 13 heads the 14 head will happen with 1/2 probability , but it will count as 2 13 successful heads. 15 will happen 4xtimes less, but...
  2. V

    Probability Question

    If you toss 100 fair coins (chance is 50% that it is heads) What is the chance that you will get 60 or more heads. Does anyone know how to calculate this probability? Thank you in advance!
  3. V

    Coin flipping

    Alan, Bob, and Charlie agreed that the “odd man” (the person whose outcome is different from others) would buy the coffee. After simultaneously flipping their coins, Bob turned up with the only “tail”. At this point Bob demanded to Alan’s and Charlie’s coins. He discovered that Alan had used...