Suppose you flip eight fair coins.   What is the probability of flipping exactly eight heads? What is the probability of flipping at least four heads? What is the probability of flipping at most seven heads? Please do not solve using Microsoft Excel.  My professor is not teaching through excel and I would like to see the steps and formula for solving the problem.

Question
  1. Suppose you flip eight fair coins.

 

  1. What is the probability of flipping exactly eight heads?
  2. What is the probability of flipping at least four heads?
  3. What is the probability of flipping at most seven heads?

Please do not solve using Microsoft Excel.  My professor is not teaching through excel and I would like to see the steps and formula for solving the problem.

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