Question
The ratio of Sylvia's age to Bob's age is 3 to 7. The ratio of Sylvia's age to Joe's is 4 to 9. The ratio of Bob's age to Joe's is:
A. 28 to 27
B. 7 to 9
C. 27 to 18
D. 10 to 13
A. 28 to 27
B. 7 to 9
C. 27 to 18
D. 10 to 13
Answers
jess
S:J = 4:9
S:B = 3:7
multiply both ratios to get 12
S:J = 12:27
S:B = 12:28
B:J = 28:27
S:B = 3:7
multiply both ratios to get 12
S:J = 12:27
S:B = 12:28
B:J = 28:27