1.

What is the ratio of the number of students studying science in collages A and B together to the number of students studying commerce in colleges D and E together?

A. 13 ∶ 8
B. 26 ∶ 17
C. 21 ∶ 17
D. 23 ∶ 15
Answer» C. 21 ∶ 17


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