1、少年宫学习美术。舞蹈和唱歌专业的学生共有90人，美术和舞蹈专业的学生比例为2：3，舞蹈和唱歌专业的学生比例为3：4，。则学生人数最多的专业有( )人。 A.25 B.30 C.35 D....
1. Dancing and singing students a total of 90 people, professional art and dance student ratio is 2:3, dancing and singing students ratio is 3:4,. It is the largest number of students have the professional (person). A.25 B.30 C.35 D....
