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Question:
if 5 coins are tossed, what is the chance that they all will show heads
Answer:

Given 5 coins are tossed.

Now there is only one way in which 5 coins will show heads i.e HHHHH

Rest of all have at least one tail.

Now, There are 25 = 32 equally likely strings of length 5 made up of the letters H and/or T.

So, probability that all the coins show heads = 1/32

 

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