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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
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\(T_b = T_s[60]-T_g[21]\)

\(T_b = 39\)

\(J_b= T_b[39]-S_b[20]\)

\(J_b = 19\)

\(J_g = T_j[34]-J_b[19]\)

\(J_g= 15\)

 

Answer:

\(15\)

 May 31, 2020

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