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17 Feb 2026, 04:54
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
70% (03:37) correct
30%
(03:41)
wrong
based on 50
sessions
History
Date
Time
Result
Not Attempted Yet
Each of the 180 students in a certain coding course is either male or female, and each student attends either in person or online. 80% of the students in the course are male, and 30% of the online students are female. If for every seven male students who attend online there are two female students who attend in person, how many of the 180 students attend online?
A. 18
B. 36
C. 40
D. 72
E. 140
A. 18
B. 36
C. 40
D. 72
E. 140
17 Feb 2026, 08:19
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Bookmarks
80% of 180 students are male: 144 males, 36 females.
Online Breakdown
30% of online students are female, so 70% male. Let O be online students; online females = 0.3 * O, online males = 0.7 * O.
Ratio Condition
In-person females = 36 - 0.3 * O.
The ratio gives 0.7 * O = \(\frac{7}{2}\) * (36 - 0.3 * O),
solving to O = 72.
ANS = D
Online Breakdown
30% of online students are female, so 70% male. Let O be online students; online females = 0.3 * O, online males = 0.7 * O.
Ratio Condition
In-person females = 36 - 0.3 * O.
The ratio gives 0.7 * O = \(\frac{7}{2}\) * (36 - 0.3 * O),
solving to O = 72.
ANS = D
17 Feb 2026, 08:20
Kudos
Bookmarks
male= 144 fmale= 36
let x be the number of people online
fmale online = 0.3x male online = 0.7x
Fmale in person: 36-0.3x
given: 0.7x/7 = (36-0.3x)/2
solve for x=72
d)
let x be the number of people online
fmale online = 0.3x male online = 0.7x
Fmale in person: 36-0.3x
given: 0.7x/7 = (36-0.3x)/2
solve for x=72
d)
