Pre-Calculus
HW: 13.3 Geometric Probability
Name _____________________________________
For numbers 1 – 3, find the probability that a point chosen at random lies in the shaded region.
1.
2.
3.
4. Use the spinner to find each probability. Assume the line separating red/orange and blue/green is straight. If the spinner lands on a
line it is spun again.
a) P(pointer landing on purple)
b) P(pointer landing on red)
c) P(pointer is pointing to the right side of the spinner)
d) P(pointer landing on yellow or orange)
5. A dart is thrown at the dartboard shown. Each sector has the same central angle. The dart has equal probability of hitting any point
on the dartboard. What is the probability that the dart will land in a shaded sector?
6. Jamie, Joe, and Pat celebrate the end of each work week by ordering spring rolls from a Chinese restaurant. The order comes with 4
spring rolls so somebody gets and extra roll. Because Jamie goes to work full time and Joe and Pat work half time, they decide who
gets the extra roll by using a spinner that has a 50% chance of coming up Jamie, and 25% chances of coming up either Joe or Pat.
Design such a spinner.