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In a music collection, there are 100 songs with an average length of exactly 180 seconds. One song is added and the new average length is exactly 181 seconds. How long, in seconds, was the added song?

 Oct 12, 2020
edited by Guest  Oct 12, 2020
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total songs length /100 = 180 

 

total songs length = 18 000

 

add one song

total songs length2 / 101 = 181

18281

 

18281 - 18000 = 281 seconds

 Oct 12, 2020

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