coins

  1. 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!
  2. I

    Stat & probability word problems

    I need help on 3 homework problems @ least get an idea as to how to go about solving them. Question 1: Tom works the night shift at a gas station on the edge of Champaign. One night he mixes 3 stale doughnuts in with 12 fresh doughnuts. That night 6 customers bought one doughnut each...