As part of a class project, a university student surveyed the students in the cafeteria lunch line to look for a relationship be
tween eye color and hair color among students. The table below contains the results of the survey.
(photo provided)___________________________
Eye Color
Hair
Color Blue Gray Green Brown Marginal
Totals
Blond 42 5 21 10 78
Red 12 22 19 12 65
Brown 22 5 12 34 73
Black 9 3 11 64 87
Marginal
Totals 85 35 63 120 303
_______________________________________
From the sample population of students with gray eyes, what is the relative frequency of students with red hair?
A.
0.07
B.
0.12
C.
0.34
D.
0.63
(photo provided)___________________________
Eye Color
Hair
Color Blue Gray Green Brown Marginal
Totals
Blond 42 5 21 10 78
Red 12 22 19 12 65
Brown 22 5 12 34 73
Black 9 3 11 64 87
Marginal
Totals 85 35 63 120 303
_______________________________________
From the sample population of students with gray eyes, what is the relative frequency of students with red hair?
A.
0.07
B.
0.12
C.
0.34
D.
0.63
1 answer:
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Answer:
32 hours.
Step-by-step explanation:
Let x represent the time taken by Russell and Aaron to build the shed.
We have been given that Russell and Aaron can build a shed in 8 hours when working together. Aaron works three times as fast as Russel.
Russell's work rate would be .
Since Aaron works three times as fast as Russel, so Aaron's work rate would be .
Part of work done by in one hour would be .
We can represent our given information in an equation as:
Let us solve for x.
Therefore, it will take Russell 32 hours to build the shed working alone.