Please help! I will medal!
The ratio of girls to boys who participated in the quiz bowl was 7:5. There were 42 girls in the competition. How many boys participated?
A)
28
B)
30
C)
35
D)
49

Question

Please help! I will medal!	
The ratio of girls to boys who participated in the quiz bowl was 7:5. There were 42 girls in the competition. How many boys participated?
A)
28	
B)
30	
C)
35	
D)
49

amistre64 · Answer

you have a ratio of 

girls:boys
  7n : 5n

when 7n=42,  what does 5n equal?

anonymous · Answer

22?

amistre64 · Answer

not quite, solve for n to determine whnat 5n would be

anonymous · Answer

28?

amistre64 · Answer

or we could just solve the setup:

7/5 = 42/b  using cross multiplication

anonymous · Answer

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