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- Math groups in Class Four and Class Two.
Math groups in Class Four and Class Two.
Thinking, the total score of the whole class is 50×64=3200 points. There are 50-x men and 50-x women, and the equation is 60x+70x (50-x) = 50× 64.
60x+3500-70x=3200
3500-3200= 10x
10x=300
x=30
50-30=20 people, 30 boys and 20 girls.
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