5 coins are tossed in parallel. What is the probability of getting at least one head?


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Answer:

 

31
32
 

Step by Step Explanation:
  1. The number of possible outcomes when 5 coins are tossed is 25.
  2. To find out the probability of getting at least one head, let's look at the outcomes where this is not true.
    i.e. the number of outcomes where you do not have even one head.
    Obviously, this is the case where you have all the tosses giving tail.
  3. There is only one case where you can get all tail.
    So, the probability of getting at least one head = 1 -  
    1
    32
      =  
    31
    32
     .

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