a;b = 8: 10, b:c = 7: 9, a:b:c = ?  Choose one
A) 56 : 70: 80 B) 56 : 70: 70 C) 56 : 70: 60 D) 56 : 70: 95 E) 56 : 70: 90
a;b = 8: 10   b:c = 7: 9   a:b:c =56 : 70: 90   Answer : 56 : 70: 90
<result>E</result>
a;b = 8: 10, b:c = 7: 9, a:b:c = ?