There are 40 students at Bali High who play stringed instruments. Of these, 1/4 play viola, 1/5 play cello, and the rest play violin. How many students play violin?

(SHOW ALL WORK)

3 answers

1/4 = 5/20
1/5 = 4/20
5/20 + 4/20 = 9/20
20/20 - 9/20 = 11/20

11/20 * 40 = ?
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