Class composition

A fifth-grade class has 25 pupils. 18% are boys and 23% are girls... [Note: problem appears inconsistent as 18% + 23% ≠ 100%; please check original data.] How many boys are in the class and how many girls?

Final Answer:

c =  15
d =  10

Step-by-step explanation:

n=25 r1=18%=10018=509=0.18 r2=23%=10023=0.23  c+d=n r1 c+r2 d=n/5 c+d=25 0.18 c+0.23 d=25/5  0.9c+1.15d=25  Row20.9 Row1Row2 0.25d=2.5  d=0.252.5=10 c=25d=2510=15  c=15 d=10



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