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28 Apr 2021, 08:00
Kudos
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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:
45%
(medium)
Question Stats:
62% (01:36) correct
38%
(01:46)
wrong
based on 110
sessions
History
Date
Time
Result
Not Attempted Yet
At the beginning of the session, a class of MBA (Finance) and a class of MBA (Marketing) of a college each had n candidates. At the end of the session, 6 candidates left MBA (Finance) course and 4 candidates left MBA (Marketing) course. How many candidates did MBA (Finance) course have at the beginning of the session?
(1) The ratio of the total number of candidates who left at the end of the session to the total number of candidates at the beginning of the session was 1:5.
(2) At the end of the session, 21 candidates remained on MBA (Marketing) course.
(1) The ratio of the total number of candidates who left at the end of the session to the total number of candidates at the beginning of the session was 1:5.
(2) At the end of the session, 21 candidates remained on MBA (Marketing) course.
30 Apr 2021, 08:33
Kudos
Bookmarks
Bunuel
We could make a table to condense the information:
\[
\begin{matrix}
Finance & Marketing \\
n & n \\
n - 6 & n - 4
\end{matrix}
\]
We are looking for n.
Statement 1:
Now we can add an extra column for "total":
\[
\begin{matrix}
Finance & Marketing&Total\\
n & n & 2n\\
n - 6 & n - 4 & 2n - 10
\end{matrix}
\]
The total number of candidates who left was 10, so \(10:2n = 1:5\). We can solve for n, sufficient.
Statement 2:
\(n - 4 = 21\). Sufficient.
Moderators:
