Answer:
30
Step-by-step explanation:
Boys : Girls
3 : 4
total is 7 which represents 70
so 3/7 × 70
gives 30
3
8x3=24
24/2=12
12+3=15
15/5=3
x=18/5, -24/5
dec. form- 3.6, -4.8
took alg.