Reteach and Skills Practice Workbook

16–4
Name
Skills Practice
Find Probability
Date
4SDAP2.1, 4SDAP2.2
Pablo is playing a game that involves taking two turns picking a
colored disc from a bag without looking. There are a total of three
discs: blue, white, and yellow. The grid shows the possible outcome of
the two picks.
Second Pick
Blue (B) White (W) Yellow (Y)
First Pick Blue (B) BB BW BY
White (W) WB WW WY
Yellow (Y) YB YW YY
Use the grid to answer each question.
1. How many possible outcomes are there?
2. What is the probability of picking 2 white discs?
3. What is the probability of picking two discs of the same color?
4. Julia is competing in the finals of an archery competition. She is
allowed two more turns to hit the middle of the target. Create a
grid to show all of the possible outcomes for her two tries. Use
the grid to find the probability of Julia hitting the target twice.
Second Try
First Try
Miss Hit
Miss Miss, Miss Miss, Hit
Hit Hit, Miss Hit, Hit
Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Grade 4 296 Chapter 16