Anna says the array of triangles pictured here can't represent because there are 20 black triangles, and 20 is greater than 4 but < 1. What should you clarify in order to interpret the black triangles as of the array? AAAAA.

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Anna says the array of triangles pictured here can't represent because there are 20 black
triangles, and 20 is greater than 4 but< 1. What should you clarify in order to interpret
the black triangles as of the array?
AAAAA
Transcribed Image Text:Anna says the array of triangles pictured here can't represent because there are 20 black triangles, and 20 is greater than 4 but< 1. What should you clarify in order to interpret the black triangles as of the array? AAAAA
Expert Solution
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There are 20 triangles in 5 rows. Each row has 5 triangles. So each row is of equal length here. If we focus on the rows then we can see that out of 5 rows , 4 rows are in black. That shows that 45 of the array is black. 

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