USING DIGITAL TECHNOLOGY A survey of 500 college students found that the percentage of students who went without using digital technology for up to 1 hr was 67 % . The survey also determined that the percentage of students who went without using digital technology for up to 30 min exceeded the percentage of students who went without using digital technology for over 1 hr by 17 % . Let x , y , and z represent the percentage of the students in the survey who went without using digital technology (a) for up to 30 min, (b) for more than 30 min but not more than 60 min, and (c) for more than 60 min, respectively. Find the values x , y , and z . Source: CourseSmart.
USING DIGITAL TECHNOLOGY A survey of 500 college students found that the percentage of students who went without using digital technology for up to 1 hr was 67 % . The survey also determined that the percentage of students who went without using digital technology for up to 30 min exceeded the percentage of students who went without using digital technology for over 1 hr by 17 % . Let x , y , and z represent the percentage of the students in the survey who went without using digital technology (a) for up to 30 min, (b) for more than 30 min but not more than 60 min, and (c) for more than 60 min, respectively. Find the values x , y , and z . Source: CourseSmart.
Solution Summary: The author explains the solution of the linear equation using Gauss-Jordan elimination method.
USING DIGITAL TECHNOLOGY A survey of
500
college students found that the percentage of students who went without using digital technology for up to
1
hr was
67
%
.
The survey also determined that the percentage of students who went without using digital technology for up to
30
min exceeded the percentage of students who went without using digital technology for over
1
hr by
17
%
.
Let
x
,
y
, and
z
represent the percentage of the students in the survey who went without using digital technology (a) for up to
30
min, (b) for more than
30
min but not more than
60
min, and (c) for more than
60
min, respectively. Find the values
x
,
y
, and
z
.
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