How many times did the coin land on heads ?

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Two friends were betting. One said to the other, “The coin will be flipped twenty times and each time the coin lands on head, I will give you $2 and each time it lands on tale, you will give me $3.” After flipping the coin for twenty times not a single penny was exchanged among them.

How many times did the coin land on heads ?

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pnikam Expert Asked on 25th August 2015 in Math Puzzles.
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  • 1 Answer(s)

    12

    Let x be the number of time heads appeared
    2x = 3(20-x) — this is because the amount won and lost was equal
    X=12

    anikam Expert Answered on 25th August 2015.
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