Varing Probabilities
Consider a fair spinner with five sections labeled 1, 2, 3, 4, and 5. The probability for landing on region 1 is onefifth, region 2 is oneeighth, region 3 is onethird, and regions 4 and 5 have unknown probabilities. The spinner can only land on one section at a time.
Describe the possible probabilities of landing in region 4 or region 5. Draw a diagram to assist your explanation.

Related External Resources 
Pie Chart [java applet]
This interactive pie chart from the Shodor foundation allows you to manipulative the size of a sector and view its percent of the circle, or vice versa.
Spinner [java applet]
This interactive resizable spinner from the Shodor foundation will compare experimental to theoretical probabilities for regions with varied sizes.
Submit your idea for an investigation to InterMath.
