Which pair of ratios form a proportion?
A.
5 : 11 and 6 : 12
B.
7 : 13 and 21 : 39
C.
8 : 14 and 24 : 30
D.
10 : 20 and 20 : 30
Please help me.
A.
5 : 11 and 6 : 12
B.
7 : 13 and 21 : 39
C.
8 : 14 and 24 : 30
D.
10 : 20 and 20 : 30
Please help me.