Sam’s teacher hands out pencils to each of the students taking a test. She has different colors pencils. The following shows the number pencils in each color category:
Purple = 10 pencils
Green = 20 pencils
Brown = 20 pencils
Pink = 50 pencils
Total = 100 pencils
If the teacher selects a pencil at random to give to Sam. What is the probability that the pencil will be pink?
a. 1 / 4
b. 1 / 2
c. 1 / 3
d. 1 / 5
Answer : b
Explanation:
A probability fraction is set up as follows:
Number of favorable outcome / number of total outcomes.
Therefore for this problem the number of favorable outcome is 50 pink pencils while the number of total outcome is 100 pencils so we set it up as follows:
50 pink pencils / 100 total pencils
50 / 100 = 1 / 2
For additional information on calculating probabilities go to: Probability.
©Copyright 2007.Najwa S. Hirn. All rights reserved.
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