Current location - Training Enrollment Network - Mathematics courses - Mathematics 156 people. Choose one eleventh of the boys and 12 of the girls to take part in the math contest. There are twice as many boys as girls.
Mathematics 156 people. Choose one eleventh of the boys and 12 of the girls to take part in the math contest. There are twice as many boys as girls.
Solution: Let the residual number of girls be X and that of boys be 2X.

x+ 12+2X/( 1- 1/ 1 1)= 156

The solution is X=45.

So the total number of girls is 45+ 12=57, and the total number of boys is 156-57=99.

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