7th Grade Math

Compound Events

PART A B

2

Multi-Part

Lesson

Get ConnectED

GLE 0706.5.5

Understand and apply basic

concepts of probability. Also

addresses GLE 0706.1.8.

Lesson 2A Compound Events 449

Main Idea

Explore the probability

of independent and

dependent events.

Independent and

Dependent Events

Place two red counters and two white counters in a paper bag. Then

complete the following activities.

Without looking, remove a

counter from the bag and

record its color. Place the

counter back in the bag.

Without looking, remove a

second counter and record its

color. The two colors are one

trial. Place the counter back in the bag.

Repeat until you have 50 trials. Count and record the

number of times you chose a red counter followed by

a white counter.

Without looking, remove a counter from the bag and

record its color. This time do not replace the counter.

Without looking, remove a second counter and record

its color. The two colors are one trial. Place both

counters back in the bag.

Repeat until you have 50 trials. Count and record the

number of times you chose a red counter followed by

a white counter.

the Results

1. In Activity 1, how many times did you choose a red counter
   followed by a white counter?


2. Were the results of Activity 2 the same or different than Activity 1?


3. Explain what caused any differences between Activity 2 and
   Activity 1.

449_455_C08_L2_895130.indd 449 12/29/09 1:26 PM