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Unfair Coins


An "unfair" coin has a heads side which weighs two and one-half times heavier than the tails side. If you toss this unfair coin 100 times, how many of those times would you expect to see heads? Explain why.



 Extensions

Design a simulation that will approximate this result. Explain your experimental design and results.



 Related External Resources

Spinner [java applet]
This interactive resizable spinner from the Shodor foundation will compare experimental to theoretical probabilities for regions with varied sizes.

Ken White's Coin Flippling Page
This site will show you the experimental results of flipping as many pennies as you would like.



Submit your idea for an investigation to InterMath.