I dont think this is a permutation or combination question.
There are 12 songs in total
each song is repeated 4 times.
total number of songs including repetitions = 12*4 = 48
every person has to select 2 different songs from 48 since repetitions are included.
48/2 = 24 students.
GPREP1-Songs selected
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Source: Beat The GMAT — Problem Solving |
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parallel_chase
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sudhir3127
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I second chases' thought... its not a P&C question.. the way he solved is the only way to do it...
