A) 3 : 7
B) 7 : 3
C) 21: 10
D) 10: 21
Correct Answer: D
Solution :
\[A:D=\frac{A}{D}=\frac{A}{B}\times \frac{B}{C}\times \frac{C}{D}\] \[=\frac{3}{4}\times \frac{5}{7}\times \frac{8}{9}=\frac{10}{21}=10:21\]You need to login to perform this action.
You will be redirected in
3 sec