Posted by Sandy on Wednesday, December 7, 2011 at 12:45am.
There are 57 students in class of 6th and 7th graders. There are twice as many 6th graders. How many 6th graders?

math  Anonymous, Wednesday, December 7, 2011 at 6:53am
divide 57 into 3 equal parts. each part is thus 19.
So, two of the parts are 6th graders: 38
The other part are 7th graders: 19