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in a class of 60 junior and senior students, 21 are girls and 34 are juniors and 20 are senior boys.  How many juniors are girls?

 May 31, 2020
 #1
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Tb=Ts[60]Tg[21]

Tb=39

Jb=Tb[39]Sb[20]

Jb=19

Jg=Tj[34]Jb[19]

Jg=15

 

Answer:

15

 May 31, 2020

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