Initially, the boys and girls in a classroom were in the ratio of 2:3. Then, 4 boys entered the room and 3 girls left the room. Then, the number of girls tripled. Now there are 24 boys in the room. How many girls are currently in the room?	Choose the correct choice from the following options:
A) 12
B) 40
C) 15
D) 34
E) 81
Working backwards: 24 boys - 4 boys = 20 boys in the room initially.   From ratio boys:girls = 2:3 = 1:3/2 we have:   girls in the room initially = (3/2)(20) = 30.   From this we work forward: (3)(30 girls - 3 girls) = 81 girls in the room.   Answer: 81
<result>E</result>
Initially, the boys and girls in a classroom were in the ratio of 2:3. Then, 4 boys entered the room and 3 girls left the room. Then, the number of girls tripled. Now there are 24 boys in the room. How many girls are currently in the room?