设男为X,女为YX+Y=46 4/5Y=3/2X X=46-Y 4/5Y=3/2(46-Y) 4/5Y=3/2*46-3/2Y 4/5Y=69-3/2Y 4/5Y+3/2Y=69 Y(4/5+3/2)=69 Y=69/(4/5+3/2) Y=69/(8/10+15/10) Y=69/(23/10) Y=69*10/23 Y=30 X=46-30=16 男生是16人.女生是30人