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MATH / An unfair coin lands on heads with probability (3)/(5), on tails with probability (1)/(5), and on its edge with probability (1)/(5). If it comes up heads, I win 4 dollars. If it co…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

problem

An unfair coin lands on heads with probability 35\frac35, on tails with probability 15\frac15, and on its edge with probability 15\frac15. If it comes up heads, I win 4 dollars. If it comes up tails, I lose 1 dollar. But if it lands on its edge, I lose 10 dollars. What is the expected winnings from one flip? Express your answer as a dollar value, rounded to the nearest cent.
Plain-text mathematical notation (without MathML)
An unfair coin lands on heads with probability (3)/(5), on tails with probability (1)/(5), and on its edge with probability (1)/(5).  If it comes up heads, I win 4 dollars.  If it comes up tails, I lose 1 dollar.  But if it lands on its edge, I lose 10 dollars.  What is the expected winnings from one flip?  Express your answer as a dollar value, rounded to the nearest cent.
Original LaTeX notation
An unfair coin lands on heads with probability $\frac35$, on tails with probability $\frac15$, and on its edge with probability $\frac15$.  If it comes up heads, I win 4 dollars.  If it comes up tails, I lose 1 dollar.  But if it lands on its edge, I lose 10 dollars.  What is the expected winnings from one flip?  Express your answer as a dollar value, rounded to the nearest cent.

level

Level 3

type

Counting & Probability

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