Transcript Chapter 11 - SchoolNotes

Chapter 11
L11-4 Notes:
Probability and Area
Probability and Area
 The probability of landing in a specific region
of a target is the ratio of the area of the
specific region to the area of the target.

Example 1
Find the probability that a randomly thrown dart
will land in the shaded region of the dartboard.
Example 2
Find the probability that a randomly thrown dart will land
in the shaded region of each dartboard.
If a dart is randomly thrown 400 times at the dartboard,
about how many times will the dart land in the shaded
region?
On Your Own…
1. Find the probability that a randomly thrown
dart will land in the shaded region of the
dartboard.
2. If a dart is randomly thrown 640 times at the
dartboard, about how many times will the dart
land in the shaded region?
Chapter 11
L11-5 Notes:
Probability of Independent Events
Vocabulary
 Two or more events in which the outcome of
one event does not affect the outcome of the
other event are independent events.
 The probability of two independent events is
found by multiplying the probability of the first
event by the probability of the second event.
Example 1
A coin is tossed, and the spinner shown is spun.
Find the probability of tossing heads and
spinning a 3.
Example 2
Amanda placed 2 red marbles and 6 yellow
marbles into a bag. She selected 1 marble
without looking, replaced it, and then selected a
second marble. Find the probability that each
marble selected was not yellow.
On Your Own…
A coin is tossed and a number cube is rolled.
Find the probability of each event.
1. P(tails and even)
2. P(heads and less than five)