how many of the 20 band members play two instruments

label Mathematics
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in a group of 20 band members, 1/4 of the members play two instruments. based on this group, predict  how 132 band members play two instruments.

Apr 28th, 2015

25% of 132 is 33. we assume the same probability of playing two instruments and get 33 people playing two instruments.

Apr 28th, 2015

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Apr 28th, 2015
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Apr 28th, 2015
Sep 20th, 2017
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