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anonymous

  • 5 years ago

a coin is tossed five times in how many ways can one get exactly no heads? five heads?

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  1. anonymous
    • 5 years ago
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    One can get no heads in exactly one way. We can see this as (5C0)=1 One can get 5 heads in exactly one way. We can see this as (5C5)=1

  2. anonymous
    • 5 years ago
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    in how many ways can one get exactly one head? four heads?

  3. anonymous
    • 5 years ago
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    Well, lets enumerate them: For one head: HTTTT, THTTT, TTHTT, TTTHT, TTTTH i.e. 5 ways This is equal to (5C1), that is the binomial coefficient or "choose" function. Now you try with 4 heads.

  4. anonymous
    • 5 years ago
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    5c2

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